Features 1、Premium Material: 1602 LCD Expansion Board, PCB gold processing technology, full material. 2、Function: LCD input and output expansion board uses 2 lines of 16 characters LCD, with contrast adjustment and backlight. 3、Keys: Using 1 analog port to complete the input of 5 keys, 1 reset button, unused IO ports are extended out for reserve, make full use of IO ports. 4、Good Performance: The 1602 LCD expansion board really simplifies the circuit by inserting the board directly into the for rduino Duemilanove controller. 5、Occupied Digital Ports: PIN4 (DB4), 5 (DB5), 6 (DB6), 7 (DB7), 8 (RS), 9 (E), 10 (backlit control), analog key port A0. Specification Item Type: LCD Expansion Board Material: PCB Purpose: DIY Module Display Capacity: 16 x 2 Characters Operating Current: 2.0mA(5.0V) Character Size: Approx. 2.95x4.35mm / 0.1x0.2in (W x H) Package List 1 x LCD Expansion Board