Features:1.This is a LED display digital DC voltage meter.2.Portable and lightweight,easy to carry.3.Many colors display optional.4.It has reverse connection protection,reverse connection does not burn.5.LED display,easy to read at night.Descriptions:This is a digital display DC voltage meter for car,motorcycle,battery cart,ship etc.Specification:Product size: 6cm*3cm*0.8cmDisplay color: (optional)2 Wire:red light12V Voltage meter:Red light, Yellow light, blue light, green light, white light2 Wire-red lightMeasuring voltage:DC4.5V-30.0VMaximum input: DC30.0V.Note: if the input voltage is higher than 30V, permanent damage may occur.Allowable error: 1%; when it is greater than or equal to 10V, the error is 0.3V; when it is less than 10V, the error is 0.10Input impedance: > 100k Working current: RedPackage included:1 x Digital VoltmeterNoted:1.Please allow 1-2mm errors due to manual measurement.2.Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.