Stunning Audio With Rich Bass: With 15W power drivers and Digital Signal Processor, X21 Portable Wireless Speaker pumps out rich bass, astonishing stereo and enhances clarity of mids and highs without distortion at any volume. Cylinder-shaped housing with aluminum passive radiator on each ends delivers an all-round presence ambiance and complete sound projection. | Super Handy Multifunctional Indoor & Outdoor Speaker: Built-in FM radio makes you stay tuned anywhere you go; built-in micro-SD card slot allows you to put your favorite songs wherever you go. Bluetooth 4.2 (100 feet range) & AUX jack provide wide range of connectivity from phones, tablets, smartwatch to laptop, PC and MP3 player etc. A great portable wireless speaker with FM radio for home, travel or outdoor sports. | Rugged & Weatherproof Caters to Tough Outdoor Activities: Featured with compact cylinder shape and rubber bumpers, X21 portable Bluetooth speaker caters perfectly to boating, golfing, biking, hiking & camping etc. With IP6X splashproof, dustproof & shockproof feature, you can enjoy music in the shower, beach and poolside. | Dual Wireless Stereo Pairing for Awesome Stereo: With a second X21 waterproof wireless speaker you can wirelessly pair 2 speakers to play together for a full left & right channel stereo. Buy 2 X21 speakers to pair them up for booming stereo. Will be great loudspeakers for party. (sold as single speaker) | Build to last : Build-in 2400mAh rechargeable Li-ion battery supports up to 10 hours of playtime; portable enough to fit into backpack & bicycle bottle holder; Build-in Hands-free speakerphone mic; Hard EAV Travel Case INCLUDED. X21 outdoor portable speaker comes with EVERY feature you need to fill your life with joy. Buy with confidence, 1 Year Warranty and 30 days Return Free, life time technical support.