--- product_id: 599552438 title: "X-Sense Smart Mailbox Alarm for Delivered Mail, APP Alerts" brand: "x-sense" price: "S$60" currency: SGD in_stock: true reviews_count: 9 category: "X Sense" url: https://www.desertcart.sg/products/599552438-x-sense-smart-mailbox-alarm-for-delivered-mail-app-alerts store_origin: SG region: Singapore --- # 50m long-range signal 4-year battery life IP65 weatherproof durability X-Sense Smart Mailbox Alarm for Delivered Mail, APP Alerts **Brand:** x-sense **Price:** S$60 **Availability:** ✅ In Stock ## Summary > 📬 Stay ahead of the mail game—secure, smart, and always connected! ## Quick Answers - **What is this?** X-Sense Smart Mailbox Alarm for Delivered Mail, APP Alerts by x-sense - **How much does it cost?** S$60 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/599552438-x-sense-smart-mailbox-alarm-for-delivered-mail-app-alerts) ## Best For - x-sense enthusiasts ## Why This Product - Trusted x-sense brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Wireless Setup:** 100% wire-free installation with included double-sided tape—set up in under 5 minutes, no tech headaches. - • **Built to Brave the Elements:** IP65-rated waterproof and UV-resistant shell ensures flawless performance rain or shine, summer or winter. - • **Seamless Multi-User Sharing:** Share alerts with family or colleagues via the X-Sense app for total mail security and peace of mind. - • **Expandable Smart Security Hub:** Connect up to 50 X-Sense devices to one base station—customize and control your entire home security ecosystem. - • **Instant Mail Alerts, Anywhere:** Get real-time push notifications the moment your mailbox opens—never miss a delivery or theft again. ## Overview The X-Sense Smart Mailbox Alarm is a sleek, wireless sensor that instantly alerts you via app when your mailbox is opened. Compatible with 2.4 GHz Wi-Fi, it offers a robust 50-meter range and a loud 100 dB base station chime. Designed for all mailbox types with IP65 weatherproofing, it boasts a 4-year battery life and supports multi-user sharing and expansion with up to 50 devices, making it a must-have for proactive mail security. ## Description desertcart.com: X-Sense Smart Mailbox Alarm for Delivered Mail, APP Alerts | Wireless Long Range Mailbox Sensor with SBS50 Base Station, Up to 4 Years of Battery Life, SMA11 : Electronics Review: MAILBOX ALARM, KNOW WHEN MAILBOX DOOR IS OPENED~CATCH A THIEF - UPDATE 7/15/2026 ********** My issue with the company is you made it so difficult for him to try to prove he had a faulty product that he just decided to do what was easiest for him. I would’ve done the same thing if I had the same issues. Below is his comment. I just wanted you to know you may find a better way, like maybe replace it rather than work with a faulty item. Mine worked fine but there’s 300 people I recommended this to That,. I hope it works like it did for me. BELOW IS WHAT MY HOA MEMBER had difficulty with this mailbox alarm….. “I'm having a really difficult time getting my X-Sense mailbox system to install. I've contacted X-Sense for technical help. The app won't let me scan the QR code on the base station and when I enter the serial number it goes nowhere. 20 minutes ago I intered the S/N and the phone is still on the entry screen. Frustrating.” “I contacted technical help via their web site” “I got a reply from X Sense with some instructions. I followed them and was still unsuccessful. The last instruction was, "If the issue still cannot be resolved, please send us a short video showing the setup process and where the app gets stuck or goes back." I'm not going to do that. I'm going to return the system and go with a different one.” “I got a reply from X Sense with some instructions. I followed them and was still unsuccessful. The last instruction was, "If the issue still cannot be resolved, please send us a short video showing the setup process and where the app gets stuck or goes back." I'm not going to do that. I'm going to return the system and go with a different one.” ********************* January 20, 2026 One of the best purchases I ever made was this mailbox alarm. That only does it alert you when the mail door is open and they’re putting mail in, it will tell you if someone opens it after the mails come and steals it. The alarm goes off on your smart phone if you’re away from the house. If you’re in the house, there are several Sounds. You can use to let you know the mail has come. It also has a blue X if there has been no mail. And there’s a red X if the mailbox door has been opened. Your smartphone also keeps a history of when the mailbox door has been opened. If you live in a rural area & worry about male theft. This is exactly what you need. Don’t forget to put up a camera that will also get a picture of when the door has been opened. I have recommended this to many neighbors in my community. It’s the best thing for your money, it’s long range and the battery lasts for a very long time. 1/20/2026 Review: Works Great! Easy setup too :) - Very happy with this X-Sense smart mailbox alarm! Setup was an absolute breeze—I had it paired to the SBS50 base station via the app and mounted inside my curbside mailbox with the included double-sided tape in less than five minutes. Here is what makes this device standout: Instant, Reliable Alerts: The real-time push notifications hit my phone the exact second the mailbox flap opens. No more walking down a long driveway in bad weather just to check an empty box! Impressive Range & Base Station: The 2.4 GHz signal easily reaches my mailbox from inside the house without dropping connection. Plus, the base station is loud (up to 100 dB) with customizable chimes so I can hear it anywhere indoors. Built to Last: The IP65 weatherproofing and UV-resistant shell have handled heat and rain like a champ without fading or glitching. Knowing the battery lasts up to 4 years gives me total peace of mind. App Features: Multi-user sharing allows my whole family to get alerts, and I love being able to expand the system with up to 50 other X-Sense security devices down the road. If you’re looking for a simple, reliable way to track your mail deliveries in real time, this device is worth every penny. Highly recommended! ## Features - Note: Compatible only with 2.4 GHz Wi-Fi (incompatible with 5.0 GHz); connects to the X-Sense Home Security App via the included base station - Real-Time Push Alerts & Multi-User Sharing: The moment your mail arrives, you'll receive an instant app push alert; manage various features from your phone, such as device sharing, mail reminder, one-button silence, adjusting volume up to 100 dB, and ringtone selection - Long-Distance Transmission, Accurate Detection: With extensive coverage, the smart mailbox alarm maintains a strong and reliable connection to the base station via a 2.4 GHz Wi-Fi network, and promptly sends notifications to your phone - Compatibility with Various Mailbox Types: This mailbox alarm is designed with a sleek and compact profile; compatible with curbside/post mount, wall mount, slot type, and cluster type mailboxes; not suitable for mail slots without lids - Extra Long Standby, Easy Setup: The replaceable battery offers a long 4-year lifespan based on 5 daily triggers; the alarm is 100% wire-free and easy to install using the double-sided tape included; following the in-app instructions, simply add it to the X-Sense app in seconds - Built for All-Weather Durability: With its IP65 waterproof rating and an operating temperature range of 14–140°F (-10–60°C), this wireless mailbox alarm operates reliably even in extreme weather; ASA shell and silicone seal prevent fading caused by sunlight and UV rays - Customize Your Home Safety System: Includes 1 mailbox alarm and 1 SBS50 base station; each base station can add 50 X-Sense devices, providing complete coverage for both your indoor and outdoor properties; customize your device names for easy location and management as needed ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CPLQ16K7 | | Audible Noise | 100 db | | Battery Description | Lithium | | Best Sellers Rank | #101 in Home Security Systems | | Brand | X-Sense | | Built-In Media | 1 X SBS50 Base Station, 1 X User Manual, 1 X Smart Mailbox Alarm SMA51 | | Color | Black | | Compatible Devices | Smartphone | | Control Method | App | | Customer Reviews | 4.3 out of 5 stars 1,546 Reviews | | Item Dimensions L x W x H | 3.91"L x 1.02"W x 1.06"H | | Item Highlight | Wireless Long Range Mailbox Sensor with SBS50 Base Station, Up to 4 Years of Battery Life, SMA11 | | Manufacturer | X-SENSE | | Maximum Range | 50 meters | | Mfr Part Number | X-SENSE | | Model Number | SMA11 | | Mounting Type | Protruding | | Number of Batteries | 1 CR2 batteries required. (included) | | Power Source | Battery Powered | | Product Dimensions | 3.91"L x 1.02"W x 1.06"H | | Sensor Technology | Infrared Sensor | | Size | 1 Alarm + Base Station | | UPC | 850053675409 | | Voltage | 3 volts | | Wattage | 1000 milliamp_hours | ## Product Details - **Brand:** X-Sense - **Color:** Black - **Compatible Devices:** Smartphone - **Power Source:** Battery Powered - **Product Dimensions:** 3.91"L x 1.02"W x 1.06"H ## Images ![X-Sense Smart Mailbox Alarm for Delivered Mail, APP Alerts - Image 1](https://m.media-amazon.com/images/I/61JsrJVrxqL.jpg) ![X-Sense Smart Mailbox Alarm for Delivered Mail, APP Alerts - Image 2](https://m.media-amazon.com/images/I/617W2EqMrnL.jpg) ![X-Sense Smart Mailbox Alarm for Delivered Mail, APP Alerts - Image 3](https://m.media-amazon.com/images/I/61BzIWlfsLL.jpg) ![X-Sense Smart Mailbox Alarm for Delivered Mail, APP Alerts - Image 4](https://m.media-amazon.com/images/I/61ARKm9QQxL.jpg) ![X-Sense Smart Mailbox Alarm for Delivered Mail, APP Alerts - Image 5](https://m.media-amazon.com/images/I/61hPCn-zjxL.jpg) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ MAILBOX ALARM, KNOW WHEN MAILBOX DOOR IS OPENED~CATCH A THIEF *by S***Y on January 20, 2026* UPDATE 7/15/2026 ********** My issue with the company is you made it so difficult for him to try to prove he had a faulty product that he just decided to do what was easiest for him. I would’ve done the same thing if I had the same issues. Below is his comment. I just wanted you to know you may find a better way, like maybe replace it rather than work with a faulty item. Mine worked fine but there’s 300 people I recommended this to That,. I hope it works like it did for me. BELOW IS WHAT MY HOA MEMBER had difficulty with this mailbox alarm….. “I'm having a really difficult time getting my X-Sense mailbox system to install. I've contacted X-Sense for technical help. The app won't let me scan the QR code on the base station and when I enter the serial number it goes nowhere. 20 minutes ago I intered the S/N and the phone is still on the entry screen. Frustrating.” “I contacted technical help via their web site” “I got a reply from X Sense with some instructions. I followed them and was still unsuccessful. The last instruction was, "If the issue still cannot be resolved, please send us a short video showing the setup process and where the app gets stuck or goes back." I'm not going to do that. I'm going to return the system and go with a different one.” “I got a reply from X Sense with some instructions. I followed them and was still unsuccessful. The last instruction was, "If the issue still cannot be resolved, please send us a short video showing the setup process and where the app gets stuck or goes back." I'm not going to do that. I'm going to return the system and go with a different one.” ********************* January 20, 2026 One of the best purchases I ever made was this mailbox alarm. That only does it alert you when the mail door is open and they’re putting mail in, it will tell you if someone opens it after the mails come and steals it. The alarm goes off on your smart phone if you’re away from the house. If you’re in the house, there are several Sounds. You can use to let you know the mail has come. It also has a blue X if there has been no mail. And there’s a red X if the mailbox door has been opened. Your smartphone also keeps a history of when the mailbox door has been opened. If you live in a rural area & worry about male theft. This is exactly what you need. Don’t forget to put up a camera that will also get a picture of when the door has been opened. I have recommended this to many neighbors in my community. It’s the best thing for your money, it’s long range and the battery lasts for a very long time. 1/20/2026 ### ⭐⭐⭐⭐⭐ Works Great! Easy setup too :) *by G***N on August 18, 2026* Very happy with this X-Sense smart mailbox alarm! Setup was an absolute breeze—I had it paired to the SBS50 base station via the app and mounted inside my curbside mailbox with the included double-sided tape in less than five minutes. Here is what makes this device standout: Instant, Reliable Alerts: The real-time push notifications hit my phone the exact second the mailbox flap opens. No more walking down a long driveway in bad weather just to check an empty box! Impressive Range & Base Station: The 2.4 GHz signal easily reaches my mailbox from inside the house without dropping connection. Plus, the base station is loud (up to 100 dB) with customizable chimes so I can hear it anywhere indoors. Built to Last: The IP65 weatherproofing and UV-resistant shell have handled heat and rain like a champ without fading or glitching. Knowing the battery lasts up to 4 years gives me total peace of mind. App Features: Multi-user sharing allows my whole family to get alerts, and I love being able to expand the system with up to 50 other X-Sense security devices down the road. If you’re looking for a simple, reliable way to track your mail deliveries in real time, this device is worth every penny. Highly recommended! ### ⭐⭐⭐⭐⭐ Turns out you don't have to pick 2 between good, fast, and cheap *by I***E on August 21, 2026* I'm quite honestly surprised at how well this works. It's set up approximately 70 feet from the base station going through 2 walls and a metal mailbox surrounded by brick. After a little over a year: Very few missed notifications or false alarms Only 1 battery change Nearly instant notifications on both the base station and app (Android) Configurable base station alarm options (tones, volume, reminder frequency) Useful and inexpensive expansion options I've tried 2 other mailbox monitoring solutions and both were more expensive, less attractive, had shorter range, and were much less reliable. As with all consumer level wireless/IoT equipment (regardless of country of origin), for security reasons, I'd highly suggest putting this on a guest or internet access only wireless network. ## Frequently Bought Together - X-Sense Smart Mailbox Alarm, Wireless Long Range Mailbox Alert, Mailbox Sensor with SBS50 Base Station for Delivered Mail, SMA11 - X-Sense Smart Mailbox Alarm, Requires SBS50 Base Station, Wireless Long Range Mailbox Alert, Mailbox Sensor for Delivered Mail, SMA51 - X-Sense Smart Home Security System, Wireless Home Alarm System 8-Piece Kit, Supports Mobile App Alerts, Compatible with Alexa, Includes 1 Base Station, 4 Door Sensors, 2 Motion Sensors, 1 Keypad, AS08 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sg/products/599552438-x-sense-smart-mailbox-alarm-for-delivered-mail-app-alerts](https://www.desertcart.sg/products/599552438-x-sense-smart-mailbox-alarm-for-delivered-mail-app-alerts) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-09-29*