Features: Time/date, switch from 12 hour to 24 hour system conversion. Alarm clock and extending 5 minutes reminding function. Temperature Can be Switched From the Display Deg.C to Fahrenheit. LED will be in a back light when using car power supply, and can display LCD full content. If using a spare battery power supply, not back light, LCD only display time and internal and external temperature. Descriptions: Car battery voltmeter. 5 minutes of snooze time. Temperature sampling every 60 seconds. 3 seconds of temp metering duration Capable of switching temperature display unit /F Specifications: Monitor size(including holder): 140x405mm (L x W) Holder size:150x20x37mm (L x W x H) Color: Black Material: Plastic & LCD Temperature measurement: --50~70 Resolution of temperature: 1 Deg.C, accuracy: +/-1.0 Deg.C Pressure indicator: DC12-24V Package included: 1 x Electronic clock 1 x Cigarette lighter cable 1 x Temperature output wire 1 x Manual(Chinese/English/Russian)