1. Dynamically monitor tire pressure on 4 wheels at the same time, prevent damage from flat tires, improve fuel efficiency, prolong tire lifespan, enhance driving safety. 2. It was designed as a direct tire pressure monitoring system, installing pressure and temperature sensors on the tire, then displaying the real-time data on phone (Android, iOS) through Bluetooth connection. 3. During travel, tire pressure and temperature are displayed in real time and send alerts when statistics are abnormal. For your safety. 4. TPMS supports both Android and iOS, requires Bluetooth 5.0. Product name: TPMS Bluetooth Tire Pressure Monitor Product style: external sensor Product specifications: 4 rounds Detection range: 0-8.0 Bar Working voltage: 3V Working current: 100mA Bluetooth operating frequency: 2.4GHz Bluetooth transmit power: 0dBm MAX Waiting time: less than or equal to 5s Display mode: mobile APP Waterproof rating: IP67 Working humidity: up to 95% Tire pressure detection range: 100-1300kPa Tire pressure detection accuracy: 10kPa Tire temperature detection accuracy: 3 Celsius Product battery: replaceable 140mAh CR1632 (external sensor) Battery life: 3~5 years (external sensor) Color: black Material: ABS plastic Package Contents: 4 x Sensors 4 x Screws 1 x Wrench 1 x English manual Only 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 allows an error of +/- 1-3cm.