The 320 CraneCom system is a hardwired fail-safe communication system designed specifically for crane operations. It provides a safer working environment for all workers while crane operations are being directed. System consists of a Master Unit and 3 phone units. Each phone unit can have up to 1,000 ft of cable connected. Built using the latest technology, and phone units using high impact nylon plastic materials and the master unit electronics enclosed in heavy duty die-cast aluminum enclosure.