Operating Voltage: 5V
5 keys: select, up, right, down, left
D4-D7: LCD Data transmission
D8: Register Select
D9: Enable pin
D10: Backlight control
APC/BT pin compatibility: APC220 Radio Comm. Module, DFRobot Bluetooth V3
Size: 3.15" x 2.28"
Includes
2x16 LCD display
6 momentary push buttons
APC/Bluetooth v3 socket