Level U Collar size can be adjusted according to your individual neck timing. The hybrid earbuds are ergonomically designed to allow you to wear comfortably and enjoy the comfort. Have magnetic earplugs, finishing easier and more simple. It provides up to 10 hours of music play, 11 hours of voice calls and 500 hours of standby time, so you can no longer worry about Bluetooth headset life. With the LEVEL U collar Bluetooth headset, you can adjust the volume, control the music status, connect the phone, and easily start the S-voice voice control without taking it out.