EnGenius Technologies DURAFON-SIP-HC, 900Mhz Landline Telephone $88.95 Very Good No further condition given. Up to 12 floors in-building penetration Up to 250,000 sq. Ft. Of facility coverage Up to 3,000 acres of property, open land coverage Base supports up to four concurrent calls Works with any ip-pbx that supports standard SIP protocols Price history (new):Read more, including price history ->