Turn on the electric door switch,fuel gauge displays a grid of red,and then connected signal line to the negative pole. Connect the signal cable,start the car,and then it can display speed. Lightweight & portable circle design,LED digital display.
| Color | Chrome |
| Brand | Unbranded |
| Country Of Origin | China |
Turn on the electric door switch,fuel gauge displays a grid of red,and then connected signal line to the negative pole. Connect the signal cable,start the car,and then it can display speed. Lightweight & portable circle design,LED digital display.