Pls Note That The Batteries Will Not Comes With The Package To You Due To The Airplane Limited.

Principle:Optics

Effect:Detect the pollution level of oil in the car and estimate whether it needs to be replaced.The oil should be replaced based on driving 5000 kilometers presently,but the new and old degree of cars,the drivers'different habits will affect the working life of the engine oil.The product uses the optical principle to detect the oil and to accurately determine the oil contamination situation.