Does this device have to use the timer? Can it stay on and off without using the timer? Is the the timer just an additional feature?

You do not need to use a timer with this device. Additionally, it has three heat settings: low, medium, and high.

What's the wattage for each setting hi/med/lo ?

Not sure wattage. I used in sub freezing (20*F) weather on lowest setting and had no fogging/dew on Nikkor Z20mm 1.8, Nikkor Z70-200 2.8, and a Tokina 14-28 2.8. Works well, surprisingly low cost. (I use a cheaply rechargeable battery bank)

Does this unit automatically turn off? i need a lens warmer that will last 4-5 days without turning off.

Only if your battery runs out. No thermostat… just constant heat settings

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USB Lens Warmer, Lens Dew Heater Strip with Temperature Regulator, Condensation Prevention for Telescopes Camera DSLR Lens Telescope Eyepieces Less Than 3.15 inch (80mm) in Diameter

USB Lens Warmer, Lens Dew Heater Strip with Temperature Regulator, Condensation Prevention for Telescopes Camera DSLR Lens Telescope Eyepieces Less Than 3.15 inch (80mm) in Diameter

Product ID: 724953661

Details

Brand
Kiwifotos
Eye Piece Lens Description
Plossl
Focus Type
Manual Focus
Objective Lens Diameter
80 Millimeters
Power Source
USB Powered

🔌USB powered for on-the-go use

❄️Operates down to -40°C cold-proof

🌡️3-level adjustable temp control

S$89

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Description

🌟 Keep your vision crystal clear—never miss a moment in the cold!

EFFORTLESS INSTALLATION - Adjustable, lightweight design installs in seconds and fits snugly without bulk or hassle.
USB POWERED PORTABILITY - Plug into any USB source—power banks, laptops, or adapters—for uninterrupted outdoor sessions.
UNIVERSAL COMPATIBILITY - Fits any lens or telescope under 80mm diameter—versatility that keeps your gear ready.
PRECISION TEMPERATURE CONTROL - Customize your lens warmth with low, medium, and high settings to beat the cold and fog.
RAPID HEAT TRANSFER INSULATION - Premium materials ensure fast warming and prevent condensation, preserving crystal-clear optics.

The Kiwifotos USB Lens Warmer is a compact, lightweight heating strip designed for lenses and telescopes up to 80mm diameter. Featuring a 1.5m temperature regulator with three heat settings, it prevents lens fogging and condensation even in extreme cold down to -40°C. Powered via USB, it offers portable, long-lasting warmth ideal for outdoor photography and astronomy, with quick installation and universal compatibility.

Specifications

ASIN	B083NJCFCH
Brand Name	Kiwifotos
Compatible Devices	Laptop, Power Bank, [Other devices with USB port]
Country of Origin	USA
Customer Reviews	4.4 4.4 out of 5 stars (255)
Eye Piece Lens Description	Plossl
Finderscope	Reflex
Focal Length Description	3.15 inches
Focus Type	Manual Focus
Item Weight	59 Grams
Manufacturer	Jinjiacheng Photography Equipment Co.,Ltd.
Manufacturer Part Number	DHS-1
Model Number	DHS-1
Number of Items	1
Objective Lens Diameter	80 Millimeters
Power Source	USB Powered
Unit Count	1.0 Count

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S$89

Duties & taxes included

In stock

Sold byAmazon SINGAPOREDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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