UNO R3 Board with USB CableNEW IMPROVEMENT: Clear prints on the female header connector, more precise and easier to use the wire. The ELEGOO UNO R3 BOARD now uses an ATMega16U2 instead of the ATMega8U2 chip. Faster transfer rates and more memory. Control using ATMEL ATMEGA328P chip(the same with Arduino UNO R3) 100% compatible with the Arduino IDE and RoHS Compliant We have always cared about the customer experience and improve the product function details. The RX and TX LEDs