This pair of waterproof radios offers 22 channels with 28 extra channels designed for GMRS (General Mobile Radio Service) operation in a rugged, weatherproof case. With a range of up to 36 miles, they're perfect for most adventures. 387 privacy codes give you up to 5560 channel options to help you block other conversations. Group Call allows you to make direct calls to other people within the group without alerting the entire group. Backlit LCD is easy to read day or night. Waterproof radios also feature privacy codes, direct/group calling, NOAA weather radio/alert/scan, silent operation, whisper function, SOS siren and more.