This is a 45 sensors to be connected up to a microcontroller, e.g. for or RaspberryPi. A great package for experiments or as a basis for a larger project. is an ATmega2560 as core microcontroller development board itself has 54 groups digital I / O input / output terminal (14 groups do PWM outputs), 16 sets of simulation than the input side, group 4 UARTs (hardware serial ports), using the 16 MHz crystal oscillator. With the bootloader, download the directly via USB without having to go through other external writer. The 2560 is an update to the , which it replaces. Colour: As shown Material: PCB Package Contents: 1 set * 45 in 1 Sensors Modules Kit For R3 Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.