This is a segment LED bar without control chip. It has 10 segment LEDs, color is yellow green. It is compatible with bread board and can work with Arduino by adding some current limiting resistors. The 10 segment LEDs have many uses, such as make protype. If you would like segment LED gauge bar, look at here. Specification LED Bar Graph Display Common Cathode Black face, white segment Luminous Color: Red ESD(HMB)2000V Corresponding Interface For any technical support or suggestion, please kindly go to our forum.