--- product_id: 147012232 title: "Antenna “Big Boy” AT-400B Flat Panel HDTV Antenna with Smartpass Amplified Outdoor/Indoor,80 Miles Range Support 4K 1080p Channels & All Older TV's for Outdoor, Attic,40ft Coax Cable" brand: "antop" price: "S$348" currency: SGD in_stock: true category: "Antop" url: https://www.desertcart.sg/products/147012232-antenna-big-boy-at-400b-flat-panel-hdtv-antenna-smartpass store_origin: SG region: Singapore --- # 80 miles max range Weather-resistant UV coating Built-in 4G LTE filter Antenna “Big Boy” AT-400B Flat Panel HDTV Antenna with Smartpass Amplified Outdoor/Indoor,80 Miles Range Support 4K 1080p Channels & All Older TV's for Outdoor, Attic,40ft Coax Cable **Brand:** antop **Price:** S$348 **Availability:** ✅ In Stock ## Summary > 📺 Cut the cord, not the quality — catch every channel, rain or shine! ## Quick Answers - **What is this?** Antenna “Big Boy” AT-400B Flat Panel HDTV Antenna with Smartpass Amplified Outdoor/Indoor,80 Miles Range Support 4K 1080p Channels & All Older TV's for Outdoor, Attic,40ft Coax Cable by antop - **How much does it cost?** S$348 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/147012232-antenna-big-boy-at-400b-flat-panel-hdtv-antenna-smartpass) ## Best For - antop enthusiasts ## Why This Product - Trusted antop brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Wide Channel Support:** Access 70+ VHF & UHF channels including legacy and latest digital broadcasts. - • **Sleek & Durable Build:** Modern flat panel design with UV-coated, weatherproof exterior for all-season use. - • **Plug & Play Versatility:** Indoor/outdoor mounting with 40ft coax cable for flexible, hassle-free setup. - • **Noise-Free 4G LTE Filter:** Blocks 3G/4G interference to deliver crystal-clear 4K & 1080p channels. - • **SmartPass Amplifier Tech:** Exclusive ANTOP design balances short & long range signals for flawless reception. ## Overview The ANTOP Big Boy AT-400B is a cutting-edge flat panel HDTV antenna featuring exclusive SmartPass amplifier technology and a built-in 4G LTE filter to ensure noise-free reception up to 80 miles. Its sleek, weather-resistant design supports 70+ channels in 4K and 1080p, making it perfect for both indoor and outdoor use with a 40ft coax cable included. Certified for quality and backed by a satisfaction guarantee, it’s the ultimate upgrade for cord-cutting professionals seeking reliable, high-definition TV signals. ## Description ANTOP’s New Generation Digital Technology1) Smart pass Amplifier, exclusive ANTOP technology, uses an all-in-one design allowing easier connection while delivering the correct balance between short and long range reception.2) 4G LTE Filter: built into all ANTOP amplified antennas, blocks 3G and 4G wireless signals for noise-free digital reception.3) High Gain reception technology, shielded for minimum interference.4) Durable exterior, waterproof design with UV coating5) Supports VHF & UHF digital signals6) Mounting accessory options If your outdoor TV antenna is not working as expected, try the following tips: or just feel free to contact us,:)1, Check to make sure you have correctly connected the antenna to your HDTV or third-party HD receiver.2, Re-scan for channels: In the TV's setup menu, set the mode to indoor antenna or air. Refer to the TV manual for detailed instructions.3, Reposition the amplifier antenna in a different location. It is suggested place it higher on a attic or outside. Sometimes moving a few feet can make a difference.4,You can receive Hi-V signals when you install the detachable rods ## Features - 1>SMARTPASS AMPLIFIER TECHONLOGY---an exclusive technology offered only by ANTOP, uses an all-in-one design to allow an easier connection between a non-amplified/passive antenna and your TV delivering the correct balance between short and long range reception，ANTOP was the first antenna manufacturer to include aBUILT-IN4G FILTER in all their amplified products to BLOCK 3G and 4G wireless signals to ensure NOISE-FREE digital TV reception. - 2>SLEEK DURABLE DESIGN---AT-400Bdigital TV antenna with NEW GENERATION DIGITAL TECHNOLOGY is designed to match similar gain of traditional bulky, unsightly mechanical antennas with an amplified signal reach of range from 0, 65 to 80 miles from point of origination to assure more channel reception and fewer blind spots. - 3> built-in- 4G LTE Filter ---blocks unwanted 3G and 4G wireless signals to ensure noise-free digital TV reception and reduce picture pixilation. - 4> durable exterior& weather resistant ---UV coated, weather Resistant exterior design combined with anti-interference internal tech protects signal reception to provide clear pictures and full Channel capacity even during inclement weather. - 5>100% QUALITY --- ANTOP outdoor TV antenna is with UL Certification, We do offer 100% satisfaction guarantee - 30 Days Back Money - 12 Months , any question you are welcome to email us, our professional after sales team always be there to service for you. Please carefully read the manual before installation. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07TXPNC7J | | AntennaDescription | Television | | Best Sellers Rank | #1,661 in TV Antennas | | Brand | ANTOP | | Color | TV antenna 20 | | Customer Reviews | 4.2 4.2 out of 5 stars (103) | | Global Trade Identification Number | 00713091930391 | | Impedance | 75 ohm | | Manufacturer | ANTOP (HONGKONG) HOLDING LIMITED | | Maximum Range | 40 feet | | Number of Channels | 70 | | Number of Items | 1 | | Number of Packs | 1 | | UPC | 713091930391 | | Unit Count | 1 Count | | Warranty Description | 1 | ## Product Details - **Antenna:** Television - **Brand:** ANTOP - **Color:** TV antenna 20 - **Impedance:** 75 ohm - **Manufacturer:** ANTOP (HONGKONG) HOLDING LIMITED - **Maximum Range:** 40 feet - **Number of Channels:** 70 - **Number of Packs:** 1 - **UPC:** 713091930391 - **Unit Count:** 1 Count ## Images ![Antenna “Big Boy” AT-400B Flat Panel HDTV Antenna with Smartpass Amplified Outdoor/Indoor,80 Miles Range Support 4K 1080p Channels & All Older TV's for Outdoor, Attic,40ft Coax Cable - Image 1](https://m.media-amazon.com/images/I/51AZncw2MOL.jpg) --- ## 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/147012232-antenna-big-boy-at-400b-flat-panel-hdtv-antenna-smartpass](https://www.desertcart.sg/products/147012232-antenna-big-boy-at-400b-flat-panel-hdtv-antenna-smartpass) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-09-29*