Stay connected while you are boating with the Cobra MRF57W 25 Watt Class D Fixed Mount VHF Radio, which is submersible for 30 minutes in 1m of water. The Rewind-Say-Again digital voice recorder automatically records the last 20 seconds of a VHF call, so you will never miss a message. You can also check RF power output, antenna output, and battery voltage when transmitting, with the Radio Check function.