RS232 Serial Port Express Card Adapter - Blue + Black + Silver
Color: Blue + black + silver - Material: Aluminum - Transform between RS232 and TTL - Working voltage: 3.3V-5V - Max baud rate up to 115200bps - Supports USB charging or external electricity supply - With source indicating receiving and sending indicator light - Interface definition: VCC/GND/TXD/RXD - Comes with 4P DuPont line (21cm)