1、Silk material and skin‑friendly, very comfortable to the touch, improving sleep quality and small in szie, durable and portable, you can use it everywhere. 2、The built‑in adjustable high‑quality speaker and microphone can realize hands‑free clear call, and the built‑in high‑performance battery can be charged for about 2 hours, providing about 13 hours of playing time. 3、Using the updated bluetooth 5.0 technology, stable connection, high‑speed and long‑distance transmission, low power consumption, bringing an excellent stereo experience. 4、The sleep earphone eye mask uses 3 dimension ergonomics technology for the eye area, blocking light, creating absolute dark areas, listening to music without wearing additional headphones. 5、The silk eye mask is very suitable for home, office, air travel, business trip, relaxation, meditation and insomnia, and you can sleep all night without being woken up. 6、The bluetooth headset can be detached from the eye mask, which is convenient for cleaning the eye holder and keeps it clean and hygienic, the perfect partner for sleep. Item Type: Silk Bluetooth Musical Eye Mask Material: Silk Bluetooth Version: 5.0 Transmission Distance: 20m/66ft Channel: Stereo Speaker Parameters: 32Ω/10mm Signal to Noise Ratio: 104dB Rechargeable Lithium Battery: 150mAh (Delivered with Battery) Playing Time: About 13 Hours Talk Time: About 14 Hours Standby Time: About 350 Hours Charging Time: About 2 Hours 1 x Silk Bluetooth Sleep Eye Mask 1 x Charging Cable 1 x Manual