Product descriptionSports 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.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.Completely washable just remove the headphones from the pouch. (gently slide the speakers to then end of the mask, remove the speaker and control panel through the hole) & You will feel a little cooler to wear our sweatband due to its breathable construction and evaporative sweat effect. TipsDo not attempt to Power on or connect the devices while charging Get the battery fully charged first then disconnect from charger before connecting the BluetoothDon't use Sleep headphones eye mask while it's chargingPlease check USB cable if can't work to chargePlease adjust the volume from your mobile or Long press Vol+ from devices if you can't hear any musicThe sound may have a bit noise if there's environmental interferenceBoth speakers are not fixed it can be adjusted according to your size