Specifications: Material: Plastic Color: Black, Orange Size: 1.4 x 1.4 x 1.1 Inch (L x W x H) Weight: 15g/pc Operating Voltage: DC12V Blinking Frequency: 50C/m-200C/m Operating Power: 21W x 2 + 3.4W Package Include: 4 x 2 Pin LED Electronic Turn Signal Flasher Relay Installation Tips: 1. Installation must be right foot position, the wrong foot position flasher function can not be achieved. 2. If you change the flashers four lights together, you need to unplug the instrument panel turn indicator. 3. B foot is the input, L foot is the output. 4. For three frequency, adjustable, counterclockwise twist faster, clockwise twist slower.