Specification:Features:1real-time monitoring: the liquid crystal display screen at the same time display 4 of the tire pressure and temperature gives you real-time understanding of the tire condition.Two charging method: tire Pressure Monitoring System TPMS is a combined with solar panels, fast charging, USB charging average resolution time not including a USB cable.Intelligent alarm: once the occurrence of an abnormal state occurs leakage alarm, high temperature alarm, high pressure alarm, low pressure alarm alarm.LCD digital screen: clear reading of bright reserve list; Pressure units for BAR/PSI temperature unit is C/F, all auto tire real time data at a glance.Effective protection:The high sensitivity sensor has a waterproof, anti-corrosion, anti-theft features, even on a rainy day you don39;t have to worry about your driving safety.Notice:Actual color may be slightly different from the image due to different display and light effect.Please allow 1-3cm deviation due to manual measurement.Descriptionmonitoring: LCD color displayoperating temperature:-20 C to 80 Cworking voltage: 3.5-4.2vthe day the operating current/night operating current/standby current: 20 ma / 4 ma / 50 uatransmitting frequency: 433.92 mhz / -20 kHztransmission mode: frequency shift keyingpressure Transmitter bar/PSIcharging Method: Solar/USB average resolution time not including the USB cablebattery: 1*402040 3.7V 300mAhdisplay size: about .9.5 * 3*1.5cmdisplay the weight with solar panel: about 71gsensor:operating temperature:- 40 C 125 Cworking voltage: 2-3.6vstandby current: 1 uatransmitting frequency: 433.92 mhz / -20 kHztransmit power: 8 dbmOpen and Distance: 30 mbattery each sensor:1 * CR2050 3V 330mAhsensor size each: about 6.5mm * 3.6mm * 1.5cmsensor of the weight each:Approx.30gpacking size: 21*15*6cm / 8.27*5.91*2.36package Weight: 370g/13.05ozPacking list:1 * Display4 * internal sensor4 * circulation valve1 * mat1 * a bag of screw1 * User Manual English Package List:1 Set Tire Pressure Sensor