Fitting of DIY、 great for Arduino DIY project、 exercise your hand and brain.Features:Great for arduino diy.Specifications:Form color: multicolored + transparentMaterial: PCBBattery: 1 * CR2025 (included)Weight: 560g / 19.75ozSize: 23.5 * 16.5 * 6cm / 9.25 * 6.5 * 2.36in ( L * W * H )Packing List:1 * UNO R3 main board1 * Expansion board1 * Breadboard (167 * 58mm)1 * Mini breadboard (50 * 39mm)5 * Green LED5 * Yellow LED5 * Red LED20 * 1k resistor20 * 10k resistor20 * 220ohm resistor1 * 74HC595N chip1 * Passive buzzer1 * Active buzzer1 * 1 Digital tube1 * 4 Digital tube1 * 8*8 Dot matrix4 * Button3 * Photoresistors1 * Potentiometer1 * LM35 temperature sensor1 * Infrared receiver1 * Flame sensor2 * Tilt sensor1 * SMD components box1 * Infrared remote controller1 * 1602 LCD module1 * Step motor(24cm/5V)1 * ULN2003 drive board30 * Jumper wires for breadboard1 * 9g Servo(25cm)1 * 9V Battery1 * 9V battery box10 * Male-to-Female Jumper Wires (20cm)1 * USB cable(45cm)1 * 40 pin header1 * Box