This is a segment LED bar without control chip. It has 10 segment LEDs, including of 8 green, 1 yellow and 1 red. It is compatible with bread board and can work with Arduino by adding some current limiting resistors. Since it has 10 pin, it may be complex to control. If you would like a modular segment LED bar, see the Grove - LED Bar.LEDs color Specification SYMBOL PARAMETER RED UNIT PAD Power Dissipation Per Segment 100 mw VR Reverse Voltage Per Segment 5 V IAF Continuous Forward Current Per Segment 20 mA IPF Peak Forward Current Per Segment(Duty-0.1,1KHz) 90 mA --- Derating Linear From 25°C Per Segment 0.5 mA/°C TOPr Operating Temperature Range -30°C to 80°C Tstg Storage Temperature Range -30°C to 85°C Solder Temperature1/16 inch Below Seating Plane 3 Seconds at 250°C Dimension For any technical support or suggestion, please kindly go to our forum.