Email us when you have problems.Features:100% Brand new and high quality!It can measure and display the temperature inside or outside of car.User-friendly design， eye-shade， reducing sunlight interference.The display is very clear during the daylight.Led light not dazzling brightness soft night.Easy installation.Three functions in one:set time， temperature， voltage.A total of four display modes.① display time only.② Display Temperature only.③ Show voltage only ④ time temperature voltage displayed alternately. Display mode is set up， the next time without re-setting with memory function.Manual error correction with a temperature setting range -5 ~ 5 ℃.Built-in memory of imported long life battery， power outages continue to go after when the car is turned off .Specifications:Color: BlackLed color: BlueMaterial: Plastic&MetalSize: 133*26*23mmVoltage : 8V-24V Package included:1x Automotive ClockGiving you a more beautiful life.