Feature 1Quality ABS material makes it firm, corrosion resistant and durable to use. 2Compact and portable styling, it is convenient to carry and store. 3Smart controller design, which features functions of constant light, dimming, delay and automatic switch. 4Waterproof design is practical, which has long service life. 5Easy installation, no need to change electrical line, convenient for using.Features: 1. Quality ABS material makes it firm, corrosion resistant and durable to use. 2. Compact and portable styling, it is convenient to carry and store. 3. Smart controller design, which features functions of constant light, dimming, delay and automatic switch. 4. Waterproof design is practical, which has long service life. 5. Easy installation, no need to change electrical line, convenient for using. 6. Intelligent start up: when the car is started (the voltage must be higher than 13 V +), the daytime running lights are switched on automatically. When the headlights (or reading lights) are switched on, the daytime running lights are dimmed (darkened), when the car is switched off (the voltage must be lower than 12.5 V), the daytime running lights are off after 15 seconds. Specification: Condition: 100% Brand New Item Type: Daytime Running Light Controller Material: ABS Color: As Picture Shown Voltage: 12-18V Operating Current: 3A Package List: 1 x Daytime Running Light Controller The Scope of Products: 1. The starting voltage is 13 V +, and the flameout voltage is lower than 12.5 V (if it is higher than this value, it will be extended for a few minutes until the voltage.) 2. 1 pair of daytime running lights total power not more than 18 W (most of the daily running lights will not exceed the total power) Wiring Instruction: 1. First connect the positive and negative side of the daytime running lights on the left and right, and connect the negative poles first. 2. Connect the red and black wires of the input with fuse on the controller to light the positive and negative poles of the battery, and the red and black terminals of the output to light the positive and negative poles of the daytime running lights. 3. Connect the yellow line on the controller to the positive pole of the headlight (or reading lamp). When the headlight (or reading lamp) is on, the brightness of the daytime running lights will be halved (darkened) to reach the dimming function (yellow line) You can choose not to pick up, that is, give this function, does not affect other applications). Note: After the battery is connected, the daytime running lights will turn on for about 15 seconds and then the light off. This is a normal phenomenon (realize the delay function). After that, you must start the car. When the voltage reaches 13 V +, it will start working!