Warning: Support cellphone with Bluetooth 4.0 or above . DO NOT support Cellphone with Bluetooth lower than 4.0. Product displays by cellphone. During driving, please be careful when viewing Vehicle Sensors Tire Pressure and temperature in cellphone. If Vehicle Sensors Tire Pressure accelerates down or up continuously, please parking and check if theres any problem with the tire. This product can read Vehicle Sensors Tire Pressure and temperature, but it cannot avoid sudden accident caused by tire.Its important to use. Tire with high quality. Slightly tire leakage makes Vehicle Sensors Tire Pressure decreases over time is normal. It has nothing to do with this product installation. Description: Dynamically monitor Vehicle Sensors Tire Pressure on 4 wheels at same time, prevent damage from flat tire, Improve fuel efficiency, prolong tire life span, ensure driving safety. It was designed as a direct Vehicle Sensors Tire Pressure monitoring system, installing pressure and temperature on the tire, then displaying the real-time data on phone (Android , IOS, IPad) through Bluetooth connection, During travel, Vehicle Sensors Tire Pressure and temperature displayed in real time and send alert when statistics abnormal. For your safety. TPMS supports both Android and iOS, requires Bluetooth 4.0 or above. APP Descriptipn: Compatible Operating System:TMPS Support Both Android And IOS, Requires Bluetooth 4.0 or above APP Installation: Option 1: Scan QR code on card, then download and install; Option 2: Search BEL TPMS in APP Store or Google play Store, then download and install. Pairing instructions: Recommend use method: bind by scanning code Open the APP. Pleaase scan the QR code card which with words one-clicking binding or complete the binding by scan the corresponding ID code. Installation and pariring Open APP. Please follow the s mark and install on correspoding tire until get each date The installation is complete. Note:If the date of cant be get , pls re-install the . (please install slowly to make the Vehicle Sensors Air Pressure fully contact the ) Package Included: 4 x Externer 4 x Screw 1 x Wrench 1 x User Manual 1 x ID