The Cellecor wireless neckband offers a total playtime of up to 75 hours on a single chargeBT-2 Neckband built-in high sensitivity microphone and noise canceling technology, ensure crystal high quality sound no mater you are calling or listening to music.The wireless neckband has advanced Bluetooth V5.0, Which Makes an instant connection to your media hassle-freeWith flexible neckband and Magnetic earbuds, BT-2 Neckband is very comfortable to wear around your neck, and ensure a snug fit on your shoulders and superior shape retention.IPX4 Waterproof: A waterproof casing protects BT-2 neckband Bluetooth headphones against rain, water, sweat, splash and more.