USB port design; 1.8m USB cable length you can connect it your power bank or any other power source with a USB port; 1.9A to 2.0A input current; 5V input voltage
Universal lens warmer;Lens Warmer prevents telescope camera lens from fogging dew by warming up the lens on a camera or telescope; it also warming up water bottle and use as wrist knee strap
Fit external diameter below 76mm; 50mm narrow width does not interfere focusing and will not produce dark corners in the field; 66g or 2.32oz net weight will not be a burden for your telescope
Temperature adjustment; strong medium weak 3 gear heating modes that you can adjust the temperature according to your requirements
Heating fast and evenly; built in aluminum make heating evenly; Alloy fiber heating wire provides super fast;Three layer insulation material to reduce heat dissipation