[Qucik Installation]Equipped with detailed wiring instructions, the thermostat comes with six wires in various colors, pre-treated wires, and simple color-coded connection instructions simplify the installation process, which means you can enjoy temperature control simply and quickly. About this item [Intelligent Temperature Control]Lrichy RV thermostat is designed to operate all R.V. Products ceiling assemblies, which control the air conditioner 115 VAC circuits through 12 relays. It may also operate any RV furnace 12 control circuit that does not exceed one amp. [Wide Compatibility]Compatible with RV Air Conditioner Mach , Mach 3 Plus Series, Mach 1 Power Saver Series, Mach III Power Saver Series, Mach 8 Series, Mach 8 Series, and Series RV air conditioning systems, fabrication standards are seamless! Number: 7330G3351, 7330F3852 [Freedom Temperature Control]Single-stage heating/cooling switching makes it easy to manage your RV's cooling, heating, gas, electric heaters, and fan functions to maintain a comfortable temperature inside your RV accurately. [Wiring Instructions]: Red: R (Positive 12V); Yellow: Y (Cooling); White: W (Heating); Green: G (High Fan Speed); Gray: H (Low Fan Speed); Blue: B (Negative 12V) Color: Black Material: ABS Package Contents: 1x Heating/Cooling Control Unit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.