Description: -Date/Hour, Week/Second Display. Switch the display between 12-hour and 24-hour -Alarm Clock. Snooze function with 5 minutes interval. -Measure temperature, measurement range: -10C-50C,Display accurate temperature readings in and outside of the car.Capable of switching temperature display unit Celsius / Fahrenheit degree. -Sampling period of thermometer? 20 seconds. Display of the car battery voltmeter. -LED backlight with double colors optional, LED backlight is on and lcd show all (including the time, temperature and volt) with automotive power. No backlight, and LCD screen only show time with spare battery power. Specification: Backlight color: Orange + Green(Green Frame),Orange + Blue (Blue Frame)(optional) Voltage: DC 12-24V Temperature measurement range: -10 to 50 Thermometer's resolution: 1,accuracy:+/-1.0 Pedestal adjust angle: 180 Product size: 9.2 * 5.5 * 2.5cm / 3.6 * 2.2 * 1in Base Diameter: Approx. 4.5cm / 1.77inch Package Includes: 1 Piece Car Digital Thermometer Voltmeter Clock Monitor 1 Piece Outdoor sensor 1 Piece car power plug 2 Pieces batteries LR4 1 Piece User Manual