Suprise your clients when you give a gift like Krazy Neckband Headphones when your next promotional event!The waterproof Neckband Headphones with Mic use latest bone conduction technology made the sound vibration passes directly to the inner ear through the bones. Say goodbye to low-quality sounds, and enjoy the charm of sports while listening to the surrounding environment.It build in recharger battery with 150 mAh capacity, battery life with120 hours standby time and up to 8 hours playtime.