The DuraFon SIP Cordless Phone System Handset is the first durable, long-range cordless phone and two-way radio. It is tested to withstand 6-foot drops over 50 times onto concrete floors without breaking. Up to 12 Floors, 250,000 sq. ft., or 3,000 Acres of Coverage Digital Two-Way Radio With Broadcast & Intercom Proven Durability Ruggedized Design