• Effective 12"/300mm Heater Length- Eliminate dew, fog, and condensation with our specially crafted lens warmer during cold weather photography. For optimal performance and even heating, it is recommended to use on lenses or telescopes with a circumference of up to 10.8"/275mm and a diameter of 86mm

• Effective 16"/400mm Heater Length- Eliminate dew, fog, and condensation with our specially crafted lens warmer during cold weather photography. For optimal performance and even heating, it is recommended to use on lenses or telescopes with a circumference of up to 15"/375mm and a diameter of 120mm
  
• Effective 20"/500mm Heater Length- Eliminate dew, fog, and condensation with our specially crafted lens warmer during cold weather photography. For optimal performance and even heating, it is recommended to use on lenses or telescopes with a circumference of up to 18.7"/475mm and a diameter of 150mm
• USB Power Source- Plug into a USB power adapter, a portable charger, or other power sources that offer a USB 5V 2A output. The 4.9ft/1.5m long USB cable makes the heater ideal for indoor and outdoor use
• 3 Temperature Levels- A temperature regulator offers 3 settings (High Mode: 55-65°C; Middle Mode: 45-55°C; Low Mode: 35-45°C) to suit different weather environments
• Touch Fastener Design- With handy touch fasteners, the heater can wrap around your lens or scope with security and is easy to adjust
• For Other Applications- As a multipurpose heater with a whole length of 20"/500mm (including the fastener part), it can also keep your baby bottle and coffee cup warm on winter days, or warm up your wrist, elbow, and ankle when they feel cold

Specifications

 300mm

• Effective Heating Length: 11.8"/300mm
• Whole Length of the Belt: 15.7"/400mm
• Temperature Adjustable: Yes
• Input Voltage: DC 5V
• Input Current: 1.8A-1.95A
• Connector: USB Type A
• Cable Coating: Nylon
• Cable Length: 4.9ft / 1.5m
• Power: 9W-9.25W
• Net Weight: 2.6oz / 75g

400mm

• Effective Heating Length: 15.7"/400mm
• Whole Length of the Belt: 19.7"/500mm
• Temperature Adjustable: Yes
• Input Voltage: DC 5V
• Input Current: 1.8A-1.95A
• Connector: USB Type A
• Cable Coating: Nylon
• Cable Length: 4.9ft / 1.5m
• Power: 9W-9.25W
• Net Weight: 2.6oz / 75g

500mm

• Effective Heating Length: 19.7"/500mm
• Whole Length of the Belt: 23.6"/600mm
• Temperature Adjustable: Yes
• Input Voltage: DC 5V
• Input Current: 1.8A-1.95A
• Connector: USB Type A
• Cable Coating: Nylon
• Cable Length: 4.9ft / 1.5m
• Power: 9W-9.25W
• Net Weight: 2.6oz / 75g

Package Contents

• 1 x Lens Heater with Temperature Regulator
• 1 x Storage Pouch
• 1 x User Manual