This slight and simple unit can be used as thermometer,Voltmeter and clock. A durable accessory for your car. You can't miss it    Features: Brand new and high quality.  Multi-function car cigarette lighter LCD clock.  Time/Date display, 12/24 hour system conversion.  Alarm function: 5 minutes of snooze time.  Measure temperature and capable of switching temperature display unit Degree /Fahrenheit.  Display car battery volmeter.  Powered by car cigarette lighter charger or 2*LR44.  Two colors of backlight for choice when the clock is powered by car cigarette lighter and there would be no backlight when it is powered by backup batteries.   Specifications: Product color: Black + Green Frame,Black + Blue Frame(optional);  Backlight color: Orange + Green(Green Frame),Orange + Blue (Blue Frame)(optional);  Voltage: DC 12-24V;  Temperature measurement range: -10℃ to 70℃;  Thermometer's resolution: 1℃,accuracy:+/-1.0℃;  Pedestal adjust angle: 180°;  Product size: 9.2 * 5.5 * 2.5cm / 3.6 * 2.2 * 1in;  The cable length of power plug: 146cm / 57.4in;  The cable length of outside sensor: 200cm / 78.7in;  Package size: 9.5 * 7 * 6cm / 3.7 * 2.7 * 2.4in;  Package weight: Approx. 141g / 4.97oz;   Package List: 1 * Car Digital Thermometer Voltmeter Monitor Clock;  1 * Outside Sensor;  1 * Car Power Plug;  2 * LR4 Battery;  1 * User Manual;  1 * Sticker