Compatibility: Custom designed to integrate onto the Walkers Razor muffs Advanced Circuitry: VOX sensitivity adjusts to your environment for no false activation Push to Talk: Push to talk or use Voice Activated Transmit for hands free communication Functionality: 22 Channels / 99 Sub Channels that can be used via Push to Talk or by Voice activated commands Bundle Includes: 3 x Walker's Razor Tactical/Hunting Walkie Talkie Attachment and 12kN Heavy Duty Carabiner with Locking Clip (Orange)