Although it's sold separately, the ActiveSafe is a must! It's probably my favorite part about the whole StereoActive package. The ActiveSafe is a modular dry box that attaches directly to the bottom of the StereoActive and keeps all of your personal belongings safe. It's large enough to fit your smartphone, individual keys, and credit cards, and it's watertight and water resistant. No longer do you have to leave your phone behind — put it in the ActiveSafe, connect it to the StereoActive via Bluetooth, and you'll always have your favorite tunes with you on the water.