Installment: insert the jack of the product into a cigar socket This digital gauge displays the voltage of batteries in the car. With high brightness of LED there is no difficulty in seeing the display. Powered by car cigarette lighter charger. Constantly monitor battery voltage, extend and protect the battery and engine life. Installment: Clean the Cigar socket. Insert the jack of the product into a Cigar socket.

3-Meter (10 feet ) Sensor Wire Water Resistant Sensor ABS Case, Gunmetal gloss finish. Weight: 122g (without box) 1.Date/Hour, Week/Second display. Switch the display between 12-hour and 24-hour. 2.Alarm Clock. 3.Snooze function with 5 minutes interval. 4.Switch temperature display between ? and ?. 5.Measure temperature, measurement range:-50?~70?. 6.Thermometer’s resolution: 1 ?;precision: ± 1.0 ?. 7.Sampling period of thermometer: 20 seconds. 8.LED backlight is on, and LCD Show all with the automotive power. No backlight, and LCD screen only show time with spare battery-power. 9.Car battery voltage indicator.