Business Exclusive Frequencies - Operates on 5 MURS FCC license free frequencies and features 219 PL/DPL codes, including 6 customizable codes to help ensure a clear signal Channel Announcement with Voice Alias - Leave radio on belt and know exactly what channel you are communicating on. Customize list of channels by selecting from 16 pre-recorded work functions, such as security, customer service, cashier, etc. Rugged design meets military specifications for sealing against dust, wind, shock, vibration and other adverse conditions. Radios also undergo Motorola's exclusive Accelerated Life Testing (ALT) that simulates up to 5 years of field use Advanced Voice Activation (VOX) - Enables hands-free operation with or without use of optional accessories.