2-in-1 Bluetooth Headphone and 3D sleep Eye MaskBluetooth 5.2 technology that produce great sound quality and easily pairs with most Bluetooth compatible devices. Stable connection and long transfer distance. Ultra-Thin Stereo Speaker covered with soft sponge foam make it very comfortable for side sleepers Long battery life and USB ChargingBuilt-in 200mAh high-performance battery, Charge about 2-2.5 hours provide more than 13-16 hours playing time. Comfortable and WashableBluetooth sleep headphones have two layers, made of 100% cotton, 3D Design, No pressure on eyes and keep girls eye makeup. Breathable and comfortable memory sponge gently touches you, just sleep like a baby.you can take out the bluetooth module and full wash the eye mask.You don't have to worry about it shrinking and deforming 100% Blackout Adjustable Blinder EyeshadeBlock out light to make your sleep better, which make you fall asleep faster.The sleep headphones with velcro , Size is 20.3-26.5inch, Velcro and speaker is adjustable, Strip can be adjusted according to the head size of the 19-29 inches, Adjustable anti-slip hook and loop closure allows a truly custom fit for Americans and fits most people (Men, Women, Kids) Bluetooth Sleep Headphones We see some side sleep person complain it is a little hard and not comfortable when have side sleeping in the evening, so we design the device in the middle forehead for your every sleep position.Special note In order to improve comfort, the speaker needs to be moved to the position corresponding to its ear to obtain a better sound, otherwise it will cause a problem of low sound