Feature: 1. STABLE IDENTIFICATION: This is an excellent RF component that provide stable identification without wire for a variety of development projects 2. MULTIPLE INTERFACES: The 4X4 development board contain a wealth of interfaces and functions for easy experimentation and customization, more practical 3. FLEXIBLE OPERATION: The film key kit is flexible in design and easy to operate, increasing the user friendliness of the development board kit 4. APPLICABLE MODEL: The development board kit is compatible with the for R3 suite and can be widely used in development projects, possess strong compatibility 5. DURABLE PLASTIC: The development board toolkit is made of excellent ABS plastic material, durable and reliable to ensure long term stable operation Specification: Item Type: Development Board Kit Material: ABS plastic Battery Type: 6 x 1.5V AA battery(not included) . Package List: 1 x 5V Stepper Motor1 x 5V Stepper Motor Driver Board1 x 1602 LCD Screen1 x Tricolor Patch10 x Large Button1 x Plug in Breadboard(green)1 x Water Level Sensor65 x Breadboard Wire5 x Small Button1 x Infrared Receiver Component1 x LM35 Component1 x Flame Component1 x Component1 x Light Sensitive Component1 x RF Module1 x Keychain1 x 1x8 Pin Header1 x 5K Adjustable Potentiometer1 x HHC Mini Motor1 x SR04 Ultrasonic Sensor1 x 4 Digit Display2 x 1 Digit Display1 x 8x8 Dot Matrix6 x F5 White LED10 x F5 Yellow LED10 x F5 Green LED10 x F5 Red LED1 x Black Rocker1 x F R3 11 x White Card1 x USB Cable1 x Active Buzzer Element1 x Passive Buzzer Element1 x 10k Adjustable Potentiometer1 x IC1 x 9g Steering Gear1 x Single Channel 5V Relay1 x 1x40 Straight Needle1 x 1x40 Curved Needle1 x Female To Female Jump Wire(10/row)1 x 830 Hole Breadboard1 x AA Battery Box1 x 595IC1 x 4x4 Film Key5 x 1K Resistance5 x 10K Resistance8 x 220R Resistance1 x Plastic Box