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

❄️operates down to -40°C

🌡️3-level adjustable temp

€ 43.11

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Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌟 Keep your lens crystal clear—never miss a shot because of dew again!

EXTREME COLD RESILIENCE - Engineered to withstand freezing conditions down to -40°C without damage or performance loss.
EFFORTLESS FIT REMOVAL - Adjustable strip fits lenses up to 80mm diameter, making setup and teardown a breeze.
UNIVERSAL USB COMPATIBILITY - Plug into any USB port—power banks, laptops, or portable chargers—for uninterrupted outdoor use.
PRECISION TEMPERATURE CONTROL - Customize your lens warmth with low, medium, and high settings for optimal dew prevention.
RAPID HEAT TRANSFER INSULATION - High-quality materials ensure fast warming and keep condensation at bay for crystal-clear shots.

The USB Lens Warmer by KIWIFOTOS is a compact, adjustable dew heater strip designed for lenses and eyepieces under 80mm diameter. Featuring a 3-level temperature regulator and USB power compatibility, it ensures reliable condensation prevention even in extreme cold down to -40°C. Lightweight and easy to install, it’s the essential accessory for outdoor photographers and astronomers who demand flawless clarity in every shot.

Specifications

ASIN	B083NJCFCH
Additional Features	Adjustable Temperature Regulator with Low, Medium, and High Modes
Best Sellers Rank	#924 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 (268)
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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€ 43.11

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Greece.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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The product quality is outstanding. Exactly what I needed for my work.

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