Celestron Smart DewHeater Controller 2X

["Using real-time data, the controller provides just enough heat to prevent dew from forming, prolonging battery life","“Smart control” system monitors ambient temperature and humidity and adjusts power to the dew heaters automatically","Compatible with Celestron Dew Heater Rings and third-party heating bands or straps (with thermistor accessory)","Supports up to two dew heaters plus one additional 12V DC device, such as your mount","Works with your Celestron telescope’s hand control or CPWI telescope control software so you can view data and make manual adjustments"]