UGREEN USB 2.0 to DB9 RS-232 Adapter Flat Cable 2m. Chipset: FTDI-FT232. Programming machine and cutting plotter are not supported. Three-layer shielding,more stable . USB 1.1v and USB 2.0V compatible. Speed up to 1 Mbps data transfer rate. Support remote wake and power managerment. Support full automatic handshake protocal for serial communication. Flat Cable. Support XP, Vista, Win7, Win8, Mac OS X etc. systems.