Smart Motorcycle Trikes TPMS Tire Pressure Monitoring System for 3 Wheelers Tire Pressure Monitor Specifications: Working voltage: 3.7-5V Storage temperature: -30°C - 90°C Working temperature: -30°C - 85°C RF transmission frequency: 433.92 MHz ± 50 KHz RF signal sensitivity: -90 dbm Display mode: LCD color Bright screen current: 6 mA Black screen current: 4 mA Sensor Specifications: Battery life: 24 months Working voltage: 2.1-3.6V Storage temperature: -30°C - 90°C Working temperature: -30°C - 85°C Temperature resolution: 2°C (25°C) Pressure range: 0-7.0 Bar Pressure resolution: 0.1 Bar Waterproof rating: IP67 Transmit power: 10 dBm Transmission frequency: 433.92 MHz Size: about 21mm (L) * 17mm (H) / 0.83 * 0.67 in Weight: about 8.0g Lithium battery: CR1632 (model)