ITEM NAME:5V / 3.3V FTDI FT232RL USB to TTL Serial Converter Adapter Module For Arduino Gw.1Pc x FT232RL 3.3V 5.5V FTDI USB to TTL Serial Adapter Module for Arduino Mini Port. Support 3.3V, 5V. RXD/TXD transceiver communication indicator. Module size:(L W) 3.50 1.8cm.