This Tire Pressure Monitoring System can display real time pressure and temperature simultaneously of 4 tires, and giving the warning once there is a abnormal status. Besides, it automatically sleep when there is no vibration. Features: Real time monitor the 4 tires' pressure and temperature simultaneously. Intelligent sleeping mode for power saving; As well as with tire leaking warning. Visual and audible warning for abnormal tire pressure and temperature. 4 tires pressure and temperature data are displayed on the monitor at a glance. There are 2 units Bar or Psi pressure unit for selection. Specifications: Material: ABS Color: Black Type: External Working Frequency: 433.9200MHz±0.1MHz Working Voltage: sensor: 2.0-3.6V; display: 5V Static Current: sensor ≤1uA; display ≤0uA Dynamic Current: sensor ≤15mA; display ≤30mA Working Temperature: sensor: -40~+125; display: -20~+70 Monitoring Temperature: -40~+130 Monitoring Pressure: 0bar~3.5bar Package Size: 13.5*10*3.5cm / 5.31*3.94*1.38in. Package weight: 139g / 4.9oz Package List: 1 * Displayer 4 * External Sensors 1 * Buckle 1 * USB Power Cable 1 * User Manual (English)