This lens heater warmer is made of high-quality materials and features a 150cm temperature regulator with low, medium, and high temperature modes. It can be used to prevent fogging and freezing on camera lenses, as well as warming up water bottles and feeding bottles. The USB port design allows for easy use with any power source. Featrues 1. Lens heating: Protects the lens of your camera or telescope before freezing and fogging. Perfect for taking pictures overnight or morning in somewhere with high humidity. 2. Material: High quality, made of premium material. Fit the most common devices. 3. Temperature adjustable: This product is equipped with an 150cm temperature regulator, with low(35-45), medium(45-55) and high(55-65) modes, which you can adjust the temperature according to different needs. 4. Multi-use: Great for lens heating, warming up water bottle and feeding bottle, and also can be use as a special wrist strap/knee to protect them from cold weather. 5. USB port design: It is very handy to use because you can connect it either to your power bank or any other power source with a USB port. Specification Material: Composite Fiber Heating Wire, Adhesive Material Color: Black Size: 386.5 cm, USB Cable 1.5m Weight: 80g Package Include: 1 Lens Heater Warmer 1 USB Cable