DIYmall 12 Bits 12 X WS2812 5050 RGB LED Ring Lamp Light with Integrated Drivers Video link https://youtu.be/_hc25l3k4Xs Voltage:DC4-7V Communication interface:Single-wire communication LED Chip:WS2812B Diameter of internal aperture is about 15/16",External diameter is 1 7/16". Height is 1/8" Warranty: one year warranty, any question please feel free to contact