1. This is a LED display digital voltage meter. 2. Portable and lightweight,easy to carry. 3. It has reverse connection protection,reverse connection does not burn. 4. This is a digital display DC voltage meter for 12v-80v car,motorcycle,battery cart,ship etc. 5. LED display,easy to read at night. Descriptions: Item Type: Digital Voltmeter Panel Product weight: 40g Display mode: three digit LED digital tube display Condition:100% Brand New&High Quality Wiring mode: two wires can be connected with positive and negative poles. Colour: Black Red-letter / Black Blue-Letter Material: ABS Size: 30 x 57mm, cable length 38.5cm Package Contents: 1 x Mini Led Digital Voltmeter Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.