1、FIT FOR SLEEPING WITH PROBLEM With 3D ergonomic technology for eye area and block light, create absolute dark area, listen to music without wearing extra headphones, give you a deep sleep for problem sleep. For home, office, travel, business strip, relaxation, mediation and insomnia. 2、BLUETOOTH 0 STEREO Bluetooth 0 technology, stable connection, high speed long distance transmission, low power consumption, bringing an excellent stereo experience. Built in adjustable high quality speaker and mic for hands free and clear calls. 3、MEMORY FOAM Bluetooth sleep mask is designed with breathable materials and a comfortable hand feel, breathable slow rebound memory foam allows you to release pressure on your face and help you fall asleep quickly. Middle Bluetooth control, perfect for side sleepers. 4、PERFECT LIGHT BLOCKING 3D eye mask for sleep alar design, the extra cushioning pad makes the contact between the eye mask and nose better and can completely block the light. Best for frequent flyers sleeping on long flights or sensitive sleepers (insomnia) who dislike harsh lights. 5、GOOD BATTERY AND WASHABLE Built in 200mAh Li‑ion battery (included), charging for about 2H, providing more than 10H of playback time, you will not be woken up at night. The sleep mask is washable (warm water is recommended), remove the Bluetooth module and cord.