Description: RXD/TXD transceiver communication indicator. USB power supply, can choose 5V or 3.3V ,set by jumper. Draw out all signal port of FT232RL chip. With over current protection, using 500MA self-restore fuse. Pin definition: DTR,RXD,TX,VCC,CTS,GND Specification: Chip: FT232RL USB Power Supply: 3.3V or 5V Interface: Mini USB Color: Red Size: Approx. 36x 18mm/ 1.42x 0.71inch Package Includes: 1 Piece FT232RL USB to TTL Adapter Module