The ep802 system provides up to 10 acres of outdoor coverage up to 6 floors of in building penetration and up to 25 000 square feet of indoor coverage by using innovative technology other features of the ep802 include a multi language setup option built in speakerphone on both the base and handset units and a two way radio for instant communication the wireless intercom is private and secure and works as a two way radio from either handset to handset or handset to base it also support