Main Parts : 
Power Jack x 2
Resistor Trimmer x 1
16-pin Stackable Header x 1
2-pin Stackable Header x 1
Serial Interface : I2C
Address : 0x20
Input : SDA, SCL
LCD Contrast : Adjustable
Brick Unit : 7 x 4

Note : 
(1) This module does not include LCD display
(2) This module accepts 16x2, 20x2, 20x4 LCD display