Innovational Bone Conduction acoustic system and open ear design give you entirely new music enjoyment and safer sports experience. Unique active jogging light and IP57 waterproof encourage you to go outside anytime anywhere.N/AN/A9 hours play time from a single chargeN/AA single charge allows around 9 hours play time.N/AN/ABone conduction acoustic drive with open ear designN/ABone Conduction leaves your ear open while running so you can be safer and more aware of your environment.N/AN/AIP57 waterproof. Waterproof and sweat-proofN/AThese sports headphones boast an IP57 soak-proof rating which means they're resistant to sustained soaking. Sweat hard train in the rain or even wear them in the shower.N/AN/ALightweight Neckband DesignN/AThe lightweight neckband design ensures you can wear comfortably for longer periods of time without messing up your hair or pressing on your head