Upgrade usb chargeable battery, Built-in 240mAh high-performance battery, Charge about 2-2.5 hours provide more than 9 hours playing time, won't be waked up at night,enough to support the whole night. Block light to make your sleep better, allows you to listen to music without wearing additional headphones,which make you fall asleep faster.Extra cushion makes eye mask and nose Press better, which can be completely shaded. Best for frequent flyers to sleep on long flights or sensitive sleepers (insomnia) who dislike glaring lights in any occasions.Sleep in a light blocked world whenever and wherever.Perfect for air travel, relaxation, meditation, insomnia. Bluetooth eye mask is made from elvet and elastic cotton, and provide a soft and comfortable feeling. Fabric liner separated from stitching is not defective,it is the place to take out the bluetooth module, so you can full wash the eye mask.You don't have to worry about it shrinking and deforming. Size is 20.3-26.5inch, Buckle is adjustable, also fit big heads,sleep eye mask can be adjusted according to the size of the head.The delicate wiring connected to the speakers that go from ear to ear is very sturdy, you can adjust adjust the position of the speakers for your ears to hear more clearly. Thickness is only one-third of the average speaker, which is very comfortable for sleepers. True HD HIFI sound featuring latest Bluetooth V-5.0 technology that produce great sound quality, bluetooth can pair your for iPhone XS Max/ for iPhone XS/ for iPhone XR/ for iPhone X/ for iPhone 7/ for iPhone 8/ for iPhone 6 or any other Smartphones for iPad Tablets easily.Compatible with Android and Ios.It is the best gift for family or friends on travel and airplane in Festivals. colour:black material:Velvet size:15x15x5cm Package Contents: 1 * Eye mask 1 * Charging cable Only the above package content, other products are not included. Note: Light reflectio