1.Dynamically monitor tire pressure on 4 wheels at same time,prevent damage from flat tire,Improve fuel efficiency, prolong tire life span, driving safety.2.It was designed as a direct tire pressure monitoring system,installing pressure and temperature sensor on the tire, then displaying the real-time data on phone (Android , IOS, ) through Bluetooth connection,3.During travel, tire pressure and temperature displayed in real time and send alert when statistics' abnormal. For your safety.4.TPMS supports both Android and iOS, requires Bluetooth 5.0 .Product name: TPMS Bluetooth Tire Pressure MonitorProduct style: external sensorProduct specifications: 4 roundsDetection range: 0-8.0 BarWorking voltage: 3VWorking current: 100ABluetooth operating frequency: 2.4GHzBluetooth transmit power: 0dBm MAXWaiting time: less than equal 5sDisplay mode: mobile APPWaterproof rating: IP67Working humidity: up to 95%Tire pressure detection range: 100-1300kPaTire pressure detection accuracy: 10kPaTire temperature detection accuracy: 3 CelsiusProduct battery: replaceable 140mAh CR1632 (external sensor)Battery life: 3~5 years (external sensor)Colour:blackMaterial:ABS plasticPackage Contents:4 x Sensors4 x Screws1 x Wrench1 x English manualOnly the above package content, other products are not included.Note: Light 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.