Durafon-SIP Handset and Charger

Additional cordless SIP handsetUp to 12 floors in-building penetration, 250,000 sq. ft. of facility coverage, 3,000 acres of property, open land coverageBase supports up to 4 concurrent calls (4 SIP or 3 SIP + 1 PSTN)Works with any IP-PBX that supports the standard SIP protocolIndependent 2-way intercom"Push-to-Talk" (PTT) broadcast featureProven durability with ruggedized design