JBL Flip 3 Stealth Waterproof Portable Bluetooth Speaker (Black) Enjoy surprisingly powerful, room-filling stereo sound with the JBL Flip 3 Stealth ultra-compact portable Bluetooth speaker. Powered by a rechargeable 3000mAh Li-ion battery, it delivers up to 10 hours of non-stop, high-quality playtime. The exterior is IPX7 rated, featuring a waterproof design with durable fabric. From tabletop to poolside, from sunny mornings to rainy nights, the Flip 3 Stealth is your ultimate all-purpose, all-weather companion.