This USB lens dew heating strip is made of neoprene materials, and the is . heating strips are widely used in digital cameras, baby bottles, telescopes, etc., to prevent condensation and dew on the surface of the equipment, and the USB charging mode brings you convenience. Features - Color: black. - Material: Neoprene. - Size: 43.00X3.50X1.00cm/ 16.90X1.38X0.39inch. - Resistance: 50. - Surface temperature: 65 degree centigrade. - Maximum voltage: 5V. - Power: 7.5W. - Total length: About 2.5m. - USB cable length: About 1m. - Using neoprene materials, safe, and durable, you can use it for a long time. - USB power supply design, you can use mobile power, wall sockets, laptops, etc. to power this heater. very convenient. - Built-in low, middle and high temperature gears to meet your needs in different situations. - Helps effectively prevent condensation and dew on the glass surface of optical equipment. - Widely used in lenses, digital cameras, binoculars, baby bottles, etc. Package list: 1 x Camera lens heater 1 x USB temperature controller