About this item: 
Advancing the development of robotics technology w/ Earth's 2nd biggest & most advanced starter kit for Arduino. 65+ pieces w/ FIVE main boards: 100% Arduino-compatible Uno R3, Mega 2560, Nano V3, ESP32 WiFi+Bluetooth and ESP8266 NodeMCU development platforms 
Explore programming electronics with all of the most common sensors and modules in Arduino like RFID Card-Key Reader, Ultrasonic Sensor, Real real-time clock, Impact Switch, 3-axis Accelerometer, LCD, Relay, Servo, and Stepper Motor - suitable for beginner or advanced users 
Build wireless IoT Automation projects with ESP32 Development Board, HC-05 Bluetooth Module, ESP8266 Wi-Fi Module, 2x NRF24L01 Wireless Transceivers and the W5100 Ethernet Shield 
All-in-one bundle with extra accessories + 16G USB storage with free access to the GAR Dropbox Cloud including PDF guides & links to tutorials and videos to help you learn to program all the parts and get started quickly