Telular Phonecell SX5D Fixed Cellular FAX Phone GSM 900/180Mhz Access the Internet and E-Mail, Dual RJ-11 connections for multiple extensions Dual Band 900/1800 GSM Phase 2+ (european networks) / Single Band 1900 GSM Phase 2+ (us networks) Automatic end-of-dialing (no SEND key), Large, easy to read LCD Caller ID, call waiting/call hold, call forwarding, Speakerphone PC keyboard can be attached for text messaging (SMS), Easy set up