2021 Upgraded Bluetooth Neckband Retractable Headphones 【High-fidelity Stereo Sound Quality】 Built-in high sensitivity microphone and noise canceling technology, ensure the neckband headphones a crystal high quality sound no mater you are calling or listening to music 【Vibration and Voice Prompt】 This Bluetooth headphones vibrate automatically when there is a phone call, never miss any phone call even in a noisy environment 【Wide Compatibility】 Support iphone, ipad, Samsung or other bluetooth enabled devices, the neckband headphones are easy to connect, can connect with 2 devices at the same time 【Specifications】 Weight: 42g/1.5oz Working Distance: about 30 feet Talk Time: 22 hours max Music Time: 20 hours max Charging Time: about 2 hours Standby Time: more than 550 hours 【What's in the Box】 1 x Bluetooth Headphone 1 x Micro USB Charging Cable 1 x User Manual 2 x Ear Tips