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.   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 Manual