IP67 waterproof floating radio marine handheld; 1s automatic floating after you drop it into the water; easy to retrieve from the sea Vibration drainage function; no worry if water gets into the speaker grill and muffles the audio; RT55 can emit a vibrating sound and shed water away and is handy in stormy weather as well NOAA weather alert;automatically find to alert you of severe weather updates and an alarm indicating a risk of severe weather Tri-watch;Marine emergency radio;Tri-watch function can watch 16CH; 9CH and current channel at the same time; easily access emergency channel 16 and call coast guard for help via 16/C button Built-in 1.5W speaker; offers a high-quality sound to ensure clear transmission and reception; users won’t miss information at work 3.5mm audio Jack; allows you to connect 3.5mm single earphone for quiet communication Brand Retevis Waterproof Rating IP67 Number of Channels 16 Additional Features Weather Alert