Features & details Velcro Strap Design for Outdoor Enthusiasts: Wearable Lightweight 0.39lbs and length 3.9", the mini Bluetooth speaker is ultraportable.Flexibly adjustable arm strap also can be used as a handle or clip.Just attach it to your bike, motorcycle,backpack or wrist with the adjustable wrist strap. Ideal for cycling, jogging and strolling Powerful Stereo Sound: Featuring full-band high-performance driver and diaphragm, ensures crisp, clear highs and a powerful bass.And provides exceptional sound both indoors and outdoors, making it a great way to let the music follow you 20Hours Long Playtime: The Srhythm K1 outdoor wireless speaker boasts an unrivaled music playback time of 20hours continuously (at 50% volume),ensuring that your party doesn’t stop prematurely Washable Wholeproduct: IPX7 waterproof and dustproof.Protected against rain and splashes,and capable of submersion in water up to 3.2 feet deep for up to 30 minutes.(Note: Cover up the part of charging and AUX ports) Wireless Bluetooth Streaming: Wirelessly stream music from your phone,tablet,or any other Bluetooth-enabled devices by simple operation