Product Description Introducing our innovative product, the vibrating neckband headphones. When your paired smartphone receives an incoming call, the neck part of the headphones will shake and vibrate to notify you. With hands-free call support, you can easily answer calls without having to reach for your phone. The cable length is adjustable for your convenience. These headphones offer up to 20 hours of wireless listening, allowing you to enjoy your favorite music for extended periods of time. The neckband design makes it easy to operate your smartphone or other players without any hassle. The charging time for these headphones is approximately 4.5 hours. These headphones are compact in size but offer a long battery life of 20 hours. You can enjoy continuous music playback for up to approximately 20 hours with Bluetooth ON. 色: Black, Blue, White, Red