Promate Velcon Wireless Neckband Earphones: IPX4 Sweat-Resistant, Active Noise-Cancelling, Anti-Slip Neckband, 35-Hour Playback: Description of the product Use Velcon to take advantage of the freedom of wireless listening and the magic of pure sound. Brilliant noise cancellation is made possible by ANC technology, which eliminates distracting background noise. The flexible and supple neckband composed of liquid silicone and the 70-hour s