Uxcell Common Cathode 12 Pin 3 Bit 7 Segment Display 1.48 X 0.75 X 0.31 Inch Product Name: 7 Segment LED Digital Display Tube; Type: Common Cathode; Model: 5631AH; Application: Widely used in home appliances, instruments, car accessories, etc. Also good for DIY and experiment Common Cathode: 12-9-8; Digital Display: 3 Digit; Digital Number: 3 Bit 7 Segment; Emitted Color: Red Pin Number: 12; Continuous Forward Current: 20mA; Average Forward Voltage: 2V; Power Consumption: 36mW. Convenient to use, it can be driven under such low voltage, low current conditions. Luminous Intensity: 11mcd; Number Height: 0.55 inch; Panel Size: 37.6 x 19 x 8mm / 1.48" x 0.75" x 0.31" (L*W*H); Total Size: 37.6 x 19 x 14.5mm / 1.48" x 0.75" x 0.57" (L*W*H) Material: Plastic, Metal; Color: Black, White; Package Content: 10 x LED Digital Display Tube?Notice: It is recommended to use constant current not constant voltage, constant voltage will cause uneven brightness.