Feature: 1. 830 Holes: This development board is equipped with 830 holes, which can be used for various modifications and upgrades to meet the various needs of the development board for connectivity. 2. Excellent ABS Material: This for R3 development board kit is made of excellent ABS plastic material, which is sturdy and durable, not easy to be damaged, and has a long service life. 3. Stable Performance: This development board improvement kit is stable in performance and powerful enough to meet a variety of use requirements, which is very convenient and practical. 4. Complete Tools: This development board module kit comes with a complete set of tools with various coloured LEDs, photo and thermistors, buzzers, resistors, etc. for quick prototyping system building. 5. Wide Application: This 830 hole development board kit has a wide range of applications, which can be used for electronic fabrication, electronic modification, robot control and so on. Specification: Item Type: Development Board Kit Material: ABS Plastic . Package List: 5 x White LEDs 5 x Yellow LEDs 5 x Blue LEDs 5 x Green LEDs 5 x Red LEDs 1 x RGB LED 2 x Photoresistors 1 x Thermistor 2 x Diode Rectifiers (1N4007) 2 x NPN Transistors (PN2222) 1 x Tilt Switch 5 x Buttons (Small) 1 x IC L293D 1 x IC 74HC595 1 x Active Buzzer 1 x Passive Buzzer 1 x Potentiometer 1 x Joystick Module 1 x 5V Relay 1 x For R3 Controller Board 1 x 830 Breadboard 1 x Power Module 1 x Ultrasonic Sensor 1 x 3V Servo Motor 1 x Fan Blade 65 x Jump Wires 1 x USB Cable 10 x Resistors (10R)10 x Resistors (100R)10 x Resistors (220R)10 x Resistors (330R)10 x Resistors (1K)10 x Resistors (2K)10 x Resistors (3K)10 x Resistors (5.1K)10 x Resistors (10K)10 x Resistors (100K)10 x Resistors (1M)10 x Female to Male Jump Wires1 x Plastic Box