Features Easy to install: full colour module, full colour soft light strips. Small size, easy to install and use Supporting microcontroller: supports real-time microcontrollers, e.g. For AVR, for PIC, for mbed etc., versatile and practical Wide application: can be used for decorative LED lighting, irregular LED video screens indoors and outdoors, etc. High brightness: RGB LED ring with WS2812 chip, bright 16-bit 5050 RGB full color LED for perfect effect Technical parameters: voltage for 5 V, digital connection. Outer diameter 68 mm, inner diameter 54 mm, total 2 pieces Specification: Item Type:RGB LED Ring Chip: WS2812 (built-in LED). LED: 16 x 5050 RGB full colour highlight. Voltage: 5 V. Port: Digital. Platform: microcontroller. Outer diameter: approx. 68 mm / 2.68 inches. Inner diameter: approx. 54 mm / 2.13 inches. Package list: 2 x RGB LED ring. Note: Cannot be used with Linux-based microcomputers or interpreted microcontrollers such as Netduino or Basic Stamp. Package List 2 x RGB LED Ring