Connect with your TP33 RV Control Panel. 1. Switches: Turn on or off the lights, water pump, water heaters and tank heater of your RV. 2. Slide Out Room Control: Slide in or out the rooms of your RV with a simple touch of your finger. 3. Tank Levels: Display fresh, black, grey and galley tank water levels of your RV. 4. Battery: Display your RV's battery level.