Wanderer Dew Terminator - 3-Channel Dew Controller or DC Switch - WDT 61 mm Refractors and each ring has three

and each ring has three adjustment points

Now your Celestron Advanced VX 9

Tracking mode: Sidereal time tracking

Integrated air cooling system –12V DC MagLev fan reduces cooldown time and provides optimal air flow while filtering out dust

Two-Room Pop-Up Observatory Tent

Wanderer Dew Terminator - 3-Channel Dew Controller or DC Switch - WDT 61 mm Refractors and each ring has threeThe Wanderer Dew Terminator is a compact & powerful 3 channel dew heater, but it can also be used as a DC hub or DC switch! The intelligent closed loop controller relies on both ambient dew point temperature and dew heater temperature (you supply the dew heaters) to keep your optics dry while avoiding overheating and wasting energy. In the Wanderer ASCOM driver, you can set the working mode of the three PWM ports to either Dew Heater or Switch. If set