Srutueo 3 In1 Car 12V Digital LED Voltmeter Voltage Temperature Clock Thermometer Car, Green Material: Plastic Display color: Green Shell color: black Rated input voltage: 12V Temperature range: -40 Celsius 75 Celsius Lighter: Powered by How to use: Turning on the force of the car, the time will be shown on the vehicle mounted clock monitor. The indicator goes off when the car power is turned off, so the clock power is not consumed. The internal clock can work properly by using industrial battery (frequent replacement is not required), and the professional chip makes the time very accurate. Package Included: 1x car digital clock with lighter plug 1x adhesive tape 1x user manual 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.