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. 4.LED display,easy to read at night. Descriptions: This is a digital display DC voltage meter for car,motorcycle,battery cart,ship etc. Specification: Display color: (optional) 2 Wire:red light 12V Voltage meter:Red light, Yellow light, blue light, green light, white light2 Wire-red light Measuring voltage:DC4.5V-30.0V Maximum 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 0.10 Input impedance: < 100k Working current: Red Package included: 1 x Digital Voltmeter Noted: 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.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 0.10 Input impedance: < 100k Working current: Red