Specification: _x005f_x000D_ Origin: Mainland China _x005f_x000D_ Communication method: Other _x005f_x000D_ Product size: 225.00x155.00x60.00mm/8.86x6.1x2.36inch _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! _x005f_x000D_ Please allow 1-2cm measuring deviation due to manual measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 x instructional CD _x005f_x000D_ 1 x R3 motherboard _x005f_x000D_ 1 x board _x005f_x000D_ 1 x servo motor (SG90) _x005f_x000D_ 1 x stepper motor _x005f_x000D_ 1x ULN2003 stepper motor control board _x005f_x000D_ 1 x prototype extension _x005f_x000D_ 1 x power module _x005f_x000D_ 1 x PIR motion sensor HC-SR501 _x005f_x000D_ 1 x ultrasonic sensor _x005f_x000D_ 1 x GY-521 module _x005f_x000D_ 1 x 3V servo motor _x005f_x000D_ 1 x MAX7219 module _x005f_x000D_ 1 x remote control _x005f_x000D_ 1 x 9V 1A power supply _x005f_x000D_ 25 x LEDs _x005f_x000D_ 1 x RGB LED _x005f_x000D_ 5 x 22PF ceramic capacitors _x005f_x000D_ 5 x 100NF ceramic capacitors _x005f_x000D_ 2 x photoresistors _x005f_x000D_ 2 x thermistor _x005f_x000D_ 5 x rectifier diodes (1N4007) _x005f_x000D_ 2 x electrolytic capacitors (10uF 50V) _x005f_x000D_ 2 x electrolytic capacitors (100uF 50V) _x005f_x000D_ 5 x NPN transistor (PN2222) _x005f_x000D_ 1 x tilt switch _x005f_x000D_ 5x button set (small) _x005f_x000D_ 1 x 1-digit 7-segment screen _x005f_x000D_ 1 x 4-digit 7-segment screen _x005f_x000D_ 1 x sound sensor module _x005f_x000D_ 1 x LCD1602 module (with pin header) _x005f_x000D_ 1 x IC L293D _x005f_x000D_ 1 x IC 74HC595 _x005f_x000D_ 1 x active buzzer _x005f_x000D_ 1 x passive buzzer _x005f_x000D_ 1 x RTC module _x005f_x000D_ 1 x temperature and humidity module DHT11 _x005f_x000D_ 2 x potentiometers _x005f_x000D_ 1 x rotary encoder module _x005f_x000D_ 1 x joystick module _x005f_x000D_ 1 x keyboard module _x005f_x000D_ 1 x 5V relay _x005f_x000D_ 1 x infrared receiver module _x005f_x000D_ 1 x cable tray 65 _x005f_x000D_ 1 x water lever sensor _x005f_x000D_ 1 x USB cable _x005f_x000D_ 1 x 9V DC battery _x005f_x000D_ 1 x RFID module RC522 _x005f_x000D_ 1 x soil moisture sensor _x005f_x000D_ 1 x MQ-2 gas sensor _x005f_x000D_ 10 x resistors (10R) _x005f_x000D_ 10 x resistors (100R) _x005f_x000D_ 30 x resistors (220R) _x005f_x000D_ 10 x resistors (330R) _x005f_x000D_ 10 x resistors (1K) _x005f_x000D_ 10 x resistors (2K) _x005f_x000D_ 10 x resistors (5K1) _x005f_x000D_ 10 x  resistors (10K) _x005f_x000D_ 10 x resistors (100K) _x005f_x000D_ 10 x resistors (1m) _x005f_x000D_ 20x male and female cables for DuPont 1. Complete and comprehensive: With over 200 components, this most complete starter kit is the most complete package you can find. It includes a whopping 63 electronic elements, providing beginners with everything they need to get started in the world of electronics. 2. Extensive learning resources: The programming beginner learning kit comes with a free PDF tutorial that offers over 30 lessons, guiding users on how to effectively use the components. Additionally, all the code for the modules is conveniently included on a CD, making it easy to follow along and learn. 3. Convenient soldering design: All the modules in the stem kit are designed for easy wiring and come with soldering points, ensuring a hassle-free assembly process. Beginners can quickly connect the components and start experimenting without any technical difficulties. 4. Compatibility and reliability: The stem projects includes an R3 control board and a USB cable, both 100% compatible with official Arduino IDE R3. This ensures a reliable and seamless integration compatible with Arduino platform, allowing beginners to explore a wide range of projects. 5. Organized and bonus gift: The most complete electrnoics starter kit is neatly packaged in a divided box, keeping all the components organized and easily accessible. Additionally, it comes with a bonus gift box for storing small parts like LEDs, ICs, buttons, diodes, and more, ensuring a tidy and clutter-free workspace.