TPMS Tyre Preure Monitoring System Solar Power LCD Display with 4 Internal/External Sensor Replaceable Battery PSI/BAR ModeNOTE:1.Use solar energy to get electricity,with 4 external/internal sensors.2.LED pannel,with extra mini USB port for charging.3.Light weight design for sensor,no need to adjust to balance when the tiremoving.4.Monitoring the tempreature and preure with high degree accuracy, display for 4 tires at the same time.5.Save fuel,forsee air leakage,reduce tire wearout,balance tirepreure,ensure safety driving.6.RF wirele technology,can auto-alarm,when tire preure and temperature is abnormal.7.With two preure unit"PSI,BAR " and two temperature unit"," foroption.8.Support tire position exchange function.9.Sensor waterproof grade:IP5K4K.10.With FREESCALE Chip and RENATA anti-explosion battery.Displayer ParameterWorking Temperature:(-20+80)Storage Temperature:(-30 +85)Input Voltage:DC 5VTransmitting Frequency:433.92MHzSize( L*W*H )mm:88*76.48*28.4mmWeight:57g