This is HL-340 USB serial Converter also called USB to DB9 or USB to RS232 com port or USB to serial cable. You may add an rs232 based port on your laptop or computer which doesn't have a db9  9 pin com port using this USB to serial converter or USB to serial cable. 

Features :

1. Single Crystal 12M Tablet 340 USB port to serial port communication.
2. USB1.1/2.0 compliant solution.
3. Built-in 128 bytes TX/512 byte RX buffer.
4. Supports the auto-Handshake Protocol.
5. Data Exchange application.

Package Includes :

• 1 x USB Serial Port (COM) USB to RS232 USB 0.75 meter length

Driver Download Link.

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