Digi 301-1004-21. Host interface: USB, Output interface: RS-232, Connector(s): DB-9. Certification: CE, FCC Part 15, Class B, EN55022, EN55024. Operating temperature range (T-T): 0 - 55 °C, Operating relative humidity range: 0 - 95 %. Cables included: USB. Connectivity technology: Wired, Safety: EN60950, UL 1950, CSA 2.2 No. 950, IEC 950