ITEM NAME: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:36mm(Length) 17.5mm(Width). The Module. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted.