Specification: Color: Black Material: ABS Size: 3.9 x 2.1 x 1.7cm(L x W x H) Weight: 32g Voltage: 12-18V Working current: 3A Time-Lapse Power Off: 15s Package List: 1 x Daytime Running Lights Controller Note: After the battery is connected, the daytime running light will turn on for about 15 seconds and then turn off the light. This is a normal phenomenon (realizing the delay function). After that, you need to start the car. When the voltage reaches 13V+, it will start working! Wiring Instruction: 1. First connect the positive and negative side of the daytime running lights on the left and right sides, and connect the negative poles first. 2. Connect the red and black wires of the input terminal with fuse on the controller to the positive and negative poles of the battery, and the red and black terminals of the output terminal to the positive and negative poles of the daytime running light. 3. Connect the yellow line on the controller to the positive pole of the headlight (or reading light). When the headlight (or reading light) is turned on, the brightness of the daytime running light will be halved (darkened) to achieve the dimming function (yellow line) You can choose not to pick up, that is, give up this function, does not affect other uses).