Sienoc 12-24V LED Strip Lights PWM Dimmer Controller For LED Lights or Ribbon lights There is a black knob, just twirl it to adjust the brightness of LED lights .PWM digital dimming, avoid rush current, protect your LED lights. Type:12V-24V 8A Dimmer Adjust single color LED light lamps and Led Strip. Input: 12V-24V Output: 1 Channel 96W 12V-24V (0-8A ) Adjust the light soft and stable, no flickering. Dimension(L x W x H): Approx. 88 x 60 x 56mm(3.5 x 2.4 x 2.2 inch)