1. Intelligent Temperature Control: This astronomical telescope dew heater features intelligent temperature regulation, providing faster and more even heat distribution across your optical devices. The active heating technology maintains the temperature to prevent condensation, ensuring clearer sky observations and astrophotography even in humid conditions. 2. Wide Compatibility: Designed for optical devices with lens diameters ranging from 65 mm to 300 mm, this antidew strip works effectively with astronomical telescopes, camera lenses, birdwatching scopes, and guide scopes. Available in various sizes (33050mm for 65mm lenses up to 108050mm for 300mm lenses), choose the right size for your specific equipment. 3. Construction: Made from quality polyester material, this heater strip delivers longlasting performance while remaining flexible enough to securely wrap around various optical instruments. The thoughtful design includes a secure fastening system to keep the heater in place during observation. 4. Easy Power Connection: Simply connect via the DC5521 port to any portable 12V power source (not included) to activate the heating element. This convenient power option makes the dew heater ideal for remote stargazing locations where traditional power sources may not be available.