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

Product ID: 184540333

Details

Brand
KIWIFOTOS
Eye Piece Lens Description
Plossl
Finderscope
Reflex
Focus Type
Manual Focus
Item Weight
59 g
Objective Lens Diameter
8 centimeters

🔌USB powered for on-the-go use

🔥3 heat modes for precise warmth

❄️Operates down to -40°C without damage

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Description

🔥 Stay Frost-Free & Focused: Never Miss a Shot Because of Dew!

PORTABLE USB POWER - Plug into any USB port or power bank for reliable, long-lasting outdoor use.
EFFORTLESS INSTALLATION - Flexible design wraps snugly around your lens and removes quickly—no tools needed.
UNIVERSAL COMPATIBILITY - Fits lenses and eyepieces up to 80mm diameter—ideal for DSLR, telescopes, and more.
CUSTOMIZABLE HEAT CONTROL - Adjust between low, medium, and high settings to keep your lens perfectly clear in any environment.
RAPID HEAT TRANSFER INSULATION - Premium materials ensure fast warming and prevent condensation from ruining your shot.

The USB Lens Warmer by KIWIFOTOS is a compact, USB-powered dew heater strip designed for lenses and eyepieces under 80mm diameter. Featuring adjustable temperature settings and durable materials that withstand temperatures as low as -40°C, it prevents condensation and fogging during outdoor photography or stargazing. Compatible with most DSLR cameras, telescopes, and powered by any USB source, it offers quick installation and reliable thermal insulation to keep your optics crystal clear in challenging conditions.

Specifications

ASIN	B083NJCFCH
Additional Features	Adjustable Temperature Regulator with Low, Medium, and High Modes
Best Sellers Rank	#696 in Digital Camera Accessories
Brand	KIWIFOTOS
Coating	Fully Coated
Compatible Devices	Laptop, Power Bank, [Other devices with USB port]
Customer Reviews	4.5 4.5 out of 5 stars (270)
Eye Piece Lens Description	Plossl
Finderscope	Reflex
Focal Length Description	3.15 inches
Focus Type	Manual Focus
Item Dimensions D x W x H	1.38"D x 5.24"W x 1.38"H
Item Weight	59 g
Manufacturer	Jinjiacheng Photography Equipment Co.,Ltd.
Manufacturer Part Number	DHS-1
Model Number	DHS-1
Mount	Altazimuth Mount
Number of Items	1
Objective Lens Diameter	8 centimeters
Optical-Tube Length	3.15 inches
Power Source	USB Powered
Unit Count	1 Count

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SAR 126

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In stock

Sold byAmazon KSADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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