... to use 2.Refresh the air in the car 3.Improve combustion efficiency Car Battery Protector (Car Safe Defender - CARNUMEN): (CE & ROHS) An ... are as followed:Features Description:1.It can test the car battery or alternator automatically, and in this way to alarm ... SUV, pick-up, trucks, compact car, luxury car, sport car etc. About how CARNUMEN to test the car batteries, release the air-ion and ...