Detail FT232RL 3.3V 5V FTDI USB to TTL Converter Adapter Module for Arduino
Features: The FT232R is a USB to serial UART interface A low-cost way to add USB capability to for Arduino or other microcontrollers. Use this to give your own breadboard for Arduino USB capability for bootloading or downloading sketches. RXD/TXD transceiver communication indicator Includes over-current protection, using a 500ma self-restoring fuse This board includes a DTR pin needed to auto-reset for Arduino when downloading to your device.
Specifications: Color: Red USB Power Supply: 3.3V or 5V Size:43*17mm Net weight: 4 g