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:Brand: KKmoonMaterial: ABSColor: BlackType: ExternalWorking Frequency: 433.9200MHz plusmn;0.1MHzWorking Voltage: sensor: 2.0-3.6V; display: 5VStatic Current: sensor le;1uA; display le;0uADynamic Current: sensor le;15mA; display le;30mAWorking Temperature: sensor: -40~+125; display: -20~+70Monitoring Temperature: -40~+130Monitoring Pressure: 0bar~3.5barPackage Size: 13.5*10*3.5cm / 5.31*3.94*1.38in.Package weight: 139g / 4.9ozPackage List:1 * Displayer4 * External Sensors1 * Buckle1 * USB Power Cable1 * User Manual (English)