Auto Car Voltage Digital LCD Temperature Thermometer Alarm Clock and Extending 5 Minutes Reminding Function / 15.5*2*3.7cm (L X W X H) 100% Brand new and high quality!, 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, Temperature sampling every 60 seconds., 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 Monitor size(including holder):14*4.5cm (L x W) Holder size:15.5*2*3.7cm (L x W x H Color: Black Material: Plastic+LCD Temperature measurement:-10 to 50 Deg.C Resolution of temperature: 1 Deg.C, accuracy: +/-1.0 Deg.C Pressure indicator: DC12-24V