Saihisday 12V Car Auxiliary Heater, 4 Ports Universal Underdash Compact Auxiliary Heater, Winter Automotive Air Conditioner for Heating&Defrosting

Function: Designed with powerful blower motor and 4 vent holes, this car air conditioner is used as windscreen defroster, demister and heater in winter. Type: 4 Ports Universal Underdash Compact Auxiliary Heater; Voltage: 12V; Power Supply: 8A; Fitting Required: 5/8""(16 mm) inner diameter water hose (NOT included). Switch Instruction 1: The red wire of the speed control switch is connected with positive pole of power supply and motor. Switch Instruction 2: The blue wire of the switch is connected with negative pole of motor. Switch Instruction 3: The black wire of the speed control is connected with negative pole of power supply