Promate Velcon Wireless Neckband Earphones Active Noise Cancelling Bluetooth Earphones w/ Anti-Slip Neckband IPX4 Sweat-Resistance & 35H Playtime - Black: Product descriptionExploit the magic of pure sound with wireless listening freedom using Velcon. ANC technology provides brilliant noise cancellation to block out unnecessary background noise and distractions. The soft and flexible neckband made of liquid silicone along with the 70-hour s