1. Intelligent Temperature Control: This telescope dew heater features intelligent temperature regulation, ensuring faster and more even heat distribution across your optical devices. Its active heating technology maintains the temperature to prevent condensation, enabling clearer sky observations and astrophotography even in humid conditions. 2. Wide Compatibility: Designed for optical devices with 65mm to 300mm diameter lenses, this anticondensation heater works effectively with astronomical telescopes, camera lenses, birdwatching scopes, and guide scopes. Available in multiple sizes (330x50mm for 65mm lenses up to 1080x50mm for 300mm lenses), it can meet the needs of different optical instruments. 3. Construction: Crafted from quality polyester material, this heater offers durability while remaining flexible to wrap securely around various optical instruments. It has a secure mounting system to keep the heater firmly in place during observation. 4. Easy Power Connection: Simply connect to any 12V power source (not included) via the DC5521 connector to activate the heating element. This convenient power option makes the dew heater suitable for remote stargazing locations where traditional power sources may be unavailable.