1.Dynamically tire preure on 4 wheels at same time,prevent damage from flat tire,Improve efficiency, protire life span, ensure driving safety.2.It was designed as a direct tire preure ing system,installing preure and temperature r on the tire, then displaying the real-time data on phone (Android , IOS, ad) through Bluetooth connection,3.During vel, tire preure 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 Preure Product style: external rProduct specifications: 4 rounds range: 0-8.0 BarWorking voltage: 3VWorking current: 100μABluetooth operating frequency: 2.4GHzBluetooth nsmit power: 0dBm MAXWaiting time: le than equal 5sDisplay mode: mobile APPWaterproof rating: 67Working humidity: up to 95%Tire preure range: 100-1300kPaTire preure accuracy: ±10kPaTire temperature accuracy: ±3 CelsiusProduct battery: repable 140mAh CR1632 (external r)Battery life: 3~5 years (external r)Colour:blackMaterial:ABS plasticPackage Contents:4 x rs4 x Screws1 x Wrench1 x English manualOnly the above package content, other products are not included.Note: Light shooting and different displays may ca the color of the item in the ture a little different from the real thing. The measurement allowed error is +/- 1-3cm.