Not every employee requires access to dial tone, the DuraWalkie allows specific employees to always be in touch yet do not have the ability to make an outgoing telephone call. Durawalkie PRO Features: Walkie Talkie, Long Range Capacity, Functions as 2 Way Radio Only, 4-Line Backlit LCD Display, Speakerphone, 6 Hours of Talk-Time, 50 Hours of Stand-by Time, Compatible w/ DuraFon PRO-HC, 2.5mm Headset Jack, Designed for Rugged Industrial Use"