Generic 2Pcs FT232RL FTDI USB To TTL Serial Converter Adapter Module For Arduino 2Pcs FT232RL FTDI USB To TTL Serial Converter Adapter Module For Arduino Feature: Chip: FT232RL Draw out all signal port of FT232RL chip RXD / TXD transceiver communication indicator USB power supply, can choose 5V or 3.3V, set by jumper With over current protection, using 500mA self-restore fuse Pin definition: DTR, RXD, TX, VCC, CTS, GND Pitch: 2.54mm Size: 36 x 18mm (L x W) Interface: Mini USB Package included: 2 x FT232RL USB to serial converter module