Notice: Dear Buyers, If you need manual in Ruian, Spanish or any lanuguage, please contact customer service, we will send the one you need. Type: Intelligent Solar TPMS Car Tire Preure -Solar power charging, don't need to charge by connecting car cigarette lighter -Rear-time monitoring preure & temperature of 4 tire -Low air preure/high temperature alarm -High Temperature / Leakage / Low Battery Alarm -Intelligent Shock Boot when car moving, don't need to turn on/off Specification: Adhere to windscreen for installationOperating frequency: 433.92Mhz 50KHzOperating voltage: 3.7-5 VWorking temperature: -20 -75 Preure Range: 0.5-3.5 Bar reading difference for external sensors: 0.3 bar / 4 PSI reading difference for internal sensors: 0.1 bar / 2 PSI 2021 New Update - Adjustable Brightne Only can be ordered from OUYOR Store TPMS Tire Preure Monitor-Risk early-warning Accurate early warning, safer driving, more reauring TPMS Tire Preure Sensor-Suitable for many kinds of car Suitable for Cars, ORV, SUV, MPV, Minibus, Wagon, etc. Questiosns & Answer 1. How to turn on the device?When you receive the device, please charge it for 3 hours, then,