Anti - theft sensor Solar power charging High and low pressure, leak alarm Simple user interface The internal sensor has a longer service life. High accuracy, Using Freescale chips Real-time monitoring tire pressure and temperature : parking automatically sleep, the car starts automatically wake up. Monitoring system body: Operating voltage:2.1-3.5V Storage temperature:-10-85 working temperature:-10-85 RF Emission frequency:433.92MH50KHz RF Signal sensitivity:-90dbm Display mode:Black and white Bright screen current:less than equal 6mA Black screen current:less than equal 4mA 2. External Sensor Battery life:24 months Temperature resolution:2(25) Pressure range:0-5.0Bar Pressure resolution:0.1Bar Waterproof grade:IP67 Transmitted power:less than equal 10dBm Emission frequency:433.92MHz Colour:Black Material:ABS Package Contents: 4 * Car External Tire Pressure Sensors 1 * display 1 * wiring harness 1Set * installation accessories 1 * English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.