Material: polyester cotton Color: gray, black Loudspeaker: 32 ohms 0.05 watts Battery: 150 mA battery 3.7 V. Charge for 2 hours, listen to songs for 8 hours Quantity: 1 piece Package Contents: 1 * bluetooth sleeping eye mask for shading 1. Perfect eye mask for sleeping and traveling Our wireless sleeping eye mask is made of skin-friendly, soft and breathable material. It's lighter, more compact and can be taken anywhere 2-in-1 music headphones and sleeping eye mask are perfect choices for home, work, business and travel. 2. Improved bluetooth eye mask 5.0 & 10 hours of playtime Real HD high fidelity sound with the latest wireless bluetooth 5.0 that allows you to easily pair your smartphones or iPads with a bluetooth device. All you need to do is charge for about 2 hours for 8 hours of playback, and you can enjoy music all night while you sleep. Perfect for those who are light asleep. 3. Ring bridge design of the nose The nose area was specially developed for upgrading the Bluetooth eye mask. The soft nose area makes you feel more comfortable and there is no pressure. They protect against all kinds of light and are perfect for anyone who sleeps in complete darkness. 4. Adjustable and washable Both the headset and the bluetooth module can be adjusted. You can always position the headset in the best position until it fits your ears. When you need to clean the eye mask, simply remove the headset and bluetooth module for ease of use. 5. Material The bluetooth sleeping eye mask is made of skin-friendly, soft and breathable material and gives a soft and comfortable feeling. It's very breathable and comfortable for deep sleepers. Just give it a try and you will like it.