Please note!!!1, 2,Only external sensors can replace battery, internal sensors can't replace battery. Type: Jansite Intelligent Solar TPMS Car Tire Preure-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 preure & temperature of 4 tires-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-Wirele 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 preure monitoring after starting the car Solar +USB ChargingWirele,No cumbersome. USB charging, prevent night / cloudy no electricity. Intelligent On and OffWhen 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 installationThe bracket is detachable and can be mounted on the center console or windshield Built-in SensorsWorking Temperature:--40 C -125CWorking Frequency:433.92MHZworking humidity:Max95%Tire monitoring range value:0bar-3.5bar Deviation0.1Battery life:2-3 yearsTransmit power:R&D environment test below-17dbExternal sensorsWorking Temperature:--20C -85CWorking Frequency:433.92MHZworking humidity:Max95%Tire monitoring range value:0bar-3.5bar Deviation0.1Battery life:1-2yearsTransmit power:R&D environment test below-17db