2 PCS RGB sensor: 1 x Two-hole version & 1 x square version This module is a color sensor based on 's TCS3472XFN color light digitizer. The sensor provides digital output of red, green, blue (RGB) and clear light sensing values. The integrated infrared blocking filter can minimize the infrared components of the incident light, and can accurately measure the color. It has high sensitivity, wide dynamic range and infrared positive filter. Minimize the effects of IR and UV components to produce accurate color measurements. And with ambient light intensity detection and shieldable interrupt. Communication via I2C interface. This design is based on the same design principle and provides design designs (square version) to provide users with more options for installation size and environment. Working voltage: 3.3V/5V Control chip: TCS3472XFN Communication interface: I2C Version: Two-hole version & square version Size: 20.5 x 20.5mm Colour:black Material:abs Package Contents: 2 x RGB sensor Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.