ITEM NAME:4 x 4 Matrix Array 16 Keys 4*4 Switch Keypad Keyboard Module B9O8 4 x 4 Matrix Array 16 Keys 4*4 Switch Keypad Keyboard Module B9O8 100% brand new and high quality Small and compact in size MINI-4x4KEY is a 4x4 matrix keyboard module. It has 8 pins and 10 number 4 Letters on the interface 8-PIN connect hole colour:black Material:ABS +3.0V to +5VDC supply voltage On-board pulled-up resistors Four mounting holes on each corner Dimension:7cm*6.5cm*0.5cm( approx) Package includes: 1 x Matrix Keyboard Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..MINI-4x4KEY is a 4x4 matrix keyboard module. It has 8 pins and 10 number 4 Letters on the interface. 1 x Matrix Keyboard. Small and compact in size. Four mounting holes on each corner. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.