This is a 16×2 LCD and Keypad shield?for Arduino Uno, Diecimila,Duemilanove and Freeduino boards.to provide a user-friendly interface thatallows users to go through the menu, make selections etc. It consists of a 1602white character blue backlight LCD. The keypad consists of 5 keys ? select, up,right, down, left and reset. To save the digital IO pins, the keypad interfaceuses only one ADC channel. The key value is read through a 5 stage voltagedivider.
Operating Voltage: 5V
Push buttons: 6