Key Specifications of Sensor and Transmitter Module: Operating temperature range: -40 ~ +125 Operating humidity: 100% Battery life: 5 years in normal use Monitored pressure range: 0~600 kPa (Accuracy: +/-2.5 kPa) 0~51 psi (Accuracy: ?,36psi) Monitored temperature range: - 30 ~ 99(Accuracy: ?5) Transmitting frequency: FSK 433.9 MHz Key Specifications of Display and Receiver Module: Power consumption: <20mA nominal, 40mA (max.) during alert :12VDC Operating temperature range: -20 ~ +70 Receiving frequency: FSK433MHz FEATURES Continuously monitor tire pressure and temperature Transmitter battery level monitor LCD display with backlight Visible and audible alert Alert when tire pressure or temperature drops or raises to the preset limit Allows user preset ID code, tire pressure and temperature level Pressure unit selectable Tire exchangeable Transmitter failure alert Easy installation and reliable Wireless parking sensor function