AlinkTrend&reg; ONE KNOB CONTROL Portable splash-proof NFC Bluetooth Speaker with Superior sound and built-in 10-hour rechargeable battery and Microphone for outdoor home shower garden (Black) EXCELLENT SOUND- Full range precision acoustic driver provides very loud, distortion-free sound in exceptionally high quality. Passive bass radiator delivers punchy bass for a perfect blend of crisp highs, strong mids and deep lows; Hang the speaker when playing bass heavy music to prevent it from moving around. Superior powerful rich sound you might not expect from such a compact speaker. HANDS-FREE PHONE- Built-In Mic for Hands-free speakerphone. Super easy control with only one button: long press to turn on/ off, press once to play music/ stops; turn around - regulate the sound, press once to answer the incoming phone call etc. NFC enabled for fast pairing. BUILT-IN BATTERY- Built-in 1000 mAh rechargeable battery with up to 10 hours of playtime on a single charge for taking on the go. Splash-proof, portable, lightweight and has a special knotted rope for outdoor lovers. ULTRA PORTABLE- IPX4 Water Resistant pushes the boundaries of portability so you can bring it to the beach, pool and in the shower. Weighs only 7.8 oz and just 4.3 long to fit in your backpack, purse, suitcase or travel bag or just hang it by the attached strap. 1 YEAR GUARANTEE AVAILABLE- Wireless stream music from smart phone, tablet or other Bluetooth-enabled device. Or plays all Audio devices through 3.5mm Aux in Jack. If there was any problem with your B09 bluetooth speaker, return it and replace a brand new, we'll offer a 12 months worry-free warranty.