Description: Only requires 3-wire for control Module adapts to TM1638 digital tube drive chip with the common anode LED digital tube Requires three common IO and could drive. MCU scan is not required 8 digital tube (including decimal point). 16 buttons Supports 8 degree brightness adjustment Size: Approx. 70x 70x 10mm/ 2.76x 2.76x 0.39inch Package Includes: 1 Piece LED Keyboard Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement
