Samcom 10-Channel Digital FM Intercom with Two Way Radio System- Smart Walkie Talkie for Home and Office(4 Stations) INTERCOM --Simple to use" Instant" Intercom system ; 10 Channel Latest Version ;Individually LOCK, Talk and Group call function; Lock button (or monitor function) continuously last 10 Hours Frequency Range: 462 - 469.95 (MHz) WALKIE TAKIE--High Illumination Flashlight ; Scrambler ; Noise Reduction Circuit;1500mAh Li-ion battery; Low Voltage Alert; Intelligent Charging ; VOX / CTCSS/DCS function/Scanning function/Emergency alarm function Free connect ability to any two way radio of Samcom Brand (Intercom) Effective distance Approx. 1000 feet; (two way radio) Effective distance Approx. 3000 feet