Solar charging,no need to connect car cigarette lighter to charge,Color LCD digital display for clear display of tire information Operating frequency:433.92MHz +/-0.1MHz Working current:less than equal 30mA Working voltage:5V Working temperature:-40 Celsius-+85 Celsius Colour:Black Material:ABS Size:95 x 80 x 26mm Pressure range:0-5.0Bar Working voltage:2.1V-3.6V Waterproof rating:IP67 Transmit power:Less than 10dBm Temperature resolution:about 2 Celsius(25 Celsius) Package Contents: 4 x host 16 x external sensor 4 x non-slip mat 4 x disassembly tool Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.