["Features:\n1.There are three functions,Set for time, temperature and voltage\n2.Three functionscan be switched at any for time.\n3.Total 4 kinds of display modes. \n4.Only display for time/only display temperature/only display voltage/three of functions alternate display (Note: in the alternatedisplay mode, can choose whether to display the temperature or voltage,through the dd option under the condition of dd:0 display for time + temperature+ voltage. dd:1 display for time + voltage. dd:2 display for time + temperature).\n5.Manual correction function with temperature error, setting range of -5~5.\n6.With a backup battery, power down for time to continue to go.\n\nSpecifications:\nVoltage:5-30V\n(to use the voltage meter function, the input voltage of at least 7V above)\nVoltage meter range: 7 ~ 20V\n( error 0.1V, measuring voltage=input voltage)\nTemperature measurement range : -50 ~ 130 ℃\n(the original temperature range from -9 ~ 60 ℃)\nCurrent :about 30mA\nSize:40mmx13mm\nThickness:14mm\nApplication: especially suitable for 12V car\n\nNote:\n1.Recommended more than 5.5V power supply, not according to the standard of power supply voltage, will burn out, the need to install the power supply wiring\n2..Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before you bid.\n3.The colors may have different as the difference display, please understand.\n\nPackage include:\n1 x Digital Car Clock Time+Temperature+Voltage 3 in1 Meter"]