- DuraFon PRO Base Unit- Engenius long range industrial cordless phone system base unit ONLY- Multi-base system (does not include any handsets)- 4 port/line base unit- 2 Way broadcast- Private handset to handset intercom- Scalable and reliable- Range up to 12 floors in a building, 3,000 acres on a ranch, 250,000 sq. ft. in a warehouse- Multiple handsets (up to 90)- Multiple lines(4 ports/lines per base unit) - Expandable to 8 base units - Ability to broadcast to handsets via analog port or line as well as from another PRO or DuraWalkie handset directly - Works behind any analog port of a PBX, phone system or analog phone line - Durable - Will work with DuraWalkie handsets- Optional external antenna for indoor use in warehouses and manufacturing plants or outdoor use on farms and car lotsPackage Contents:- 1 DuraFon PRO base unit