[IPX7 Waterproof Rating] Otium bluetooth headphones are adopting the highly sealed shell + nano-coating waterproof technology, its waterproof performance reaches IPX7 waterproof standard, and it is not afraid of sweat attack even if it is used in severe sports. Great for running, hiking, cycling, fitness, yoga, travel, gym etc. | [Superior Stereo Sound] The Wireless headphones with bluetooth 5.1 technology, providing the stereo sound and superb bass sound.Clear high & low volume. Excellent wireless earbuds sound. Built-in mic with voice notification of incoming calls. Also we have upgraded the bluetooth name from "Otium" to "U8", it will more conveniently to search and connect with the U8 headphones. | [Up to 15 hours Playtime] While in full battery charge, this headsets can playing up to 15 hours for you all day enjoy yourself. Super quick charge time with full charge light indication.The headphone battery status will be automatically displayed on the IOS Phone screen. | [Easier Button Control] Allows skip/play/pause on your music tracks as well as all phone use without reaching your phone. Super quick pairing with android, IOS and other bluetooth devices. | [State of the art earphones design] The ideal choice for workout sweatproof bluetooth ear buds. Great for Running, Jogging, Hiking, Biking, Gym etc. Stay in Ear Tech with Comfortable Ear Hook. Neckband design, no wires tangling, and it's easy to storage to your sports armband or arm package bag.