This tire pressure monitoring system is characterized by excellent waterproof performance, which enables it to be used in the rainy weather safely and achieve long term use. This tire pressure monitoring system, which can accurately monitor the tyre pressure and temperature and alarm to ensure your riding safety, is worthwhile to buy. Made of premium plastic and electronic component, it is reliable and durable to use. The length of the product is 4.5cm, the width is 4.5cm, and the height is 2.2cm. It is suitable for most motorcycles. Item Name: Tire Pressure Monitoring System Material: Plastic, Electronic Components Working Frequency: 433.92MHz Operating Temperature: -30~70 degrees Celsius Working Voltage: 5V Working Current: 28ah Battery Capacity: 550mAh(Included) Sensor Parameters: Operating Frequency: 433.92MHz+/-0.05 Operating Temperature: -30~70 degrees Celsius Working Voltage: 2.1v-3v Working Current: Static: 1mAh, Instantaneous Emission: