Product details Color Green Form Factor In Ear Connectivity Technology Wireless About this item charge for 3 hours, listen to music for 100 hours; 1000 hours long standby bass earphones The three-dimensional soft neck is skin-friendly material, flexible and lightweight, and the collar has a memory rebound characteristic, which can be restored to its original with ic suction type automatic adsorption, the two chambers are combined and automatically adsorbed to avoid entanglement during storage Neckband wireless earbuds use the latest Bluetooth 5.1 technology to provide pairing and powerful connections up to 33 feet away. the middle button and the headset will easily connect to your device.