Features:The main function is to monitor car tire internal pressure and allow you to know the tire condition.Good accuracy and sensitivity, enhance the safety of your vehicle.A good aftermarket replacement directly replaces your old or broken one.This is a non-OEM product, accessory only!Specification:Color: Black, Silver ToneMaterial: Plastic, MetalOE Number: 36106855539Frequency: 433MHzSize: 8x5x1.8cm / 3.15"x1.97"x0.