Specification:
Cigarette lighter plug: 7.7x2.6x1.9cm/
Package size: Approx.9.6x6.7x7cm/3.78"x2.64"x2.76"(LxWxH)

Functions Outline:
Time/Date display,12/24V hours system conversion
Alarm function
Snooze function,snooxe time:5 minutes
Capable of switching temperature display unit:Celsius/Fahrenheit
Measure temperature, measurement range: -50Celsius
~70Celsius
Thermometer's resolution:1Celsius
;accuracy:±1.0Celsius
Temp metering duration: 3 seconds
Two colors of Backlight for choices. If the power is supplied by the car cigarette lighter when plugged, backlight is light up and all the conents(Including the time,temperature and volt) will be displayed on the LCD screen. If the power is supplied by the backup battery when unplugged, there is no backlight and LCD screen will display the time, outdoor&indoor temp.
Car battery voltmeter(DC 12-24V)

Key-press function:
Time Key: Switch over between Time and Date, press TIME key for 2 seconds to enter the time setting status.
ALM Key: Display the alarm time, press ALM key for 2 seconds to enter the alarm setting status..
UP Key:Upward key+1, Under alarm setting status, press UP key tp turn on/off the alarm sound.
SNZ Key: Set snooze
DOWN/ Celsius/Fahrenheit Key: Downward key-1, switchover between Celsius/Fahrenheit, press DOWN   Celsius/Fahrenheit   key for 2 seconds to turn on the outdoor Freeze-alert.

Package Included:
1x 12-24V Car Voltage Digital Monitor Battery Alarm Clock LCD Temperature Thermeter