CODASH TPMS With Clock Solar Car Tire Preure Wirele Monitoring System LCD Display 4 External Sensor Tire Preure Sensor TPMS receiver:-Battery: 400mAh (built-in)-Working voltage: DC 5V-RF transmiion frequency: 433.92MHz-Preure unit: psi / bar-Temperature unit: Deg.C / Deg.F.-Working temperature: -20~85-Storage temperature: -40 ~125Internal sensor:-Working preure: 0-51 psi / 0-3.5 bar-Preure accuracy: 0.1BAR-Transmiion frequency: 433.92MHz-Working temperature: -20~85-Storage temperature: -40~125-Working voltage: 2.0-3.6V-Waterproof rating: IP67-Battery: Built-in CR24500 button battery (not replaceable)External sensor:-Working preure: 0-51 psi / 0-3.5 bar-Preure accuracy: +/- 0.1BARi-Working frequency: 433.92MHz-Working voltage: 2.0-3.6V-Waterproof: IP67-Working temperature: -40~85-Storage temperature: -40~125-Battery: Built-in CR1632 120mAh button battery (replaceable)Packing size: 16*14*5cm