MEGA2560 R3 40 Sensor Modules Starter Kit IIC 20 x 4 2004 LCD Display For ArduinoWith this kit you can get 40 sensors and modules. Our 40 sensors kit allow you to know what each sensor does and combined multiple sensors to work out a project. For example, make a button push to control led light with the button module and led module, and you can make more complicated one by adding a relay module to control a home lighting. LCD2004 with IIC module solder on can help you to display the sensor value on screen instead of viewing on the