Sleep Mask Headphones- what for?if your bedroom cannot completely be shaded by black-out curtains and you want to sleep inif you want to listen to your music without having to wear additional headphonesif you cannot fall asleep because your partner Snoring or wants to read or watch TVif you want to sleep while travelling, e.g. on airplanes or in trainsif you are looking for perfect relaxation during yoga, wellness or meditationWhy ChooseSleep Headphones allows you to listen to music without wearing additional headphones and earplugs. A good helper for you to eliminate fatigue, improve sleep and give you more energy to work and study. Fits different kinds of occasion such as indoor, outdoor, camping, or when you are taking all kinds of transports .Wireless Headphones and Sleep Eye Mask 2 in 1wireless sleep eye mask allows you to listen to music without wearing additional headphones and earplugs, which make you fall asleep faster.True HD high fidelity sound featuring latest wireless 5.0 that produce great sound quality and easily pairs with smartphones, computers, and most other wireless compatible devices.The speaker has a built-in microphone to enable you to talk on the phone hands-free. And the speakers are movable. please adjust volume after covering ears, long press the " +/-" button or use phone to adjust.The eye mask has a flexible Velcro strap. You can adjust the strap to the most comfortable position until fit your head wellPlay Long Battery LifePowered by a rechargeable 240mAH high-performance lithium battery, charged via USB (cable supplied) about 2 hours provide more than 9 hours playing time, no beeps after power run out of. you can have a very good sleeping all night.Washable MaterialA line connect two speaker and one control panel in sleep headphones, you need pull it out slowly before washing.After it completely dried, the speaker and control panel need put back to their original position.Extremely soft and Breathable MaterialEye mask contains two layers: 100% polyester, 100%cotton. 100% light-tight.The eye mask has a flexible Velcro strap. You can adjust the strap to the most comfortable position until fit your head well