Please note!!! 1, When you receive the package and turn onthe receiver, the receiver displays --"or 00, please don't worry. You only need to mount the sensor on the tire, wait for about 1 minute, and you will see the display shows the pressure and temperature of the tire. 2,Only external sensors can replace battery, internal sensors can't replace battery. Type: Jansite Intelligent Solar TPMS Car Tire Pressure -Solar power charging, don't need to charge by connecting car cigarette lighter -Colorful LCD Digital displaying, clear to show tire information -Rear-time monitoring pressure & temperature of 4 tires -Low air pressure/high temperature alarm -High Temperature / Leakage / Low Battery Alarm -Intelligent Shock Boot when car moving, don't need to turn on/off -Wireless connect by sensors, easy install -Build-in sensors and external sensors options, meets all your need - Two units (PSI / Bar) changeable , you can set the one you like. Omnidirectional protect tires every moment Automatically start tire pressure monitoring after starting the car< Solar +USB Charging Wireless,No cumbersome. USB charging, prevent night / cloudy no electricity. Intelligent On and Off When the car is started, the vibration of the machine is automatically opened and the machine is shut down automatically when it is still, without manual operation. Two ways of installation The bracket is detachable and can be mounted on the center console or windshield Built-in Sensors Working Temperature:- -40 -125 Working Frequency:433.92MHZ working humidity:Max95% Tire monitoring range value:0bar-3.5bar Deviation0.1 Battery life:2-3 years Transmit power:R&D environment test below-17db External sensors Working Temperature:- -20 -85 Working Frequency:433.92MHZ working humidity:Max95% Tire monitoring range value:0bar-3.5bar Deviation0.1 Battery life:1-2years Transmit power:R&D environment test below-17db