Fit Most Head Size

Sports headbands /Sleep headphones are super stretchy. It will fit your head perfectly and very comfortable without being too tight or too loose. You will have a very good sleep with this sleep headphones.

Long Lasting Performance

Built-in 240mAh high-performance battery, Charge about 2-2.5 hours provide up to 10 hours playing time,In the middle night will not wake you up, even if you open it asleep,Halfway battery is exhausted , there will be no low battery beep will wake you up, You can sleep peacefully all night.