Using real-time data, the controller provides just enough heat to prevent dew from forming, prolonging battery lifeSmart control system monitors ambient temperature and humidity and adjusts power to four dew heaters automaticallyCompatible with Celestron Dew Heater Rings and third-party heating bands or straps (with thermistor accessory)Also provides power management for your entire setup with four 12V DC power output ports (one with variable voltage)Integrated USB 3.2 hub with three powered USB Type A ports allows you to connect all your devices to your computer with only one cableWorks with your Celestron telescopes hand control or CPWI telescope control software so you can view data and make manual adjustmentsMounts securely to your telescope's dovetail or tripod legDurable metal housing features an integrated cooling fan to protect the controllers electronics