USED 5 X 8 LED, dot matrix display. X/Y addressing: using red and green LEDs with common anodes (row) and (columns) allowing you to light a red, a green or both. 15mA continious forward current, 80mA @ 1/16 duty cycle. 2.1 V max forward drop, 5V max reverse voltage. Side and end stackable. .40" dot size, .60" pitch. White diffused lens / gray face.