Item Type: Bluetooth Musical Eye MaskMaterial: CottonBluetooth Version: 5.0Transmission Distance: 20m/66ftChannel: StereoSpeaker Parameters: 32/10mmSignal to Noise Ratio: 104dBRechargeable Lithium Battery: 150mAh (Delivered with Battery)Playing Time: About 13 HoursTalk Time: About 14 HoursStandby Time: About 300 HoursCharging Time: About 2 HoursPackage List1 x Bluetooth Sleep Music Eye Mask1 x Charging Cable1 x Manual1Three dimension ergonomics technology for the eye area to block light and create absolute darkness and ideal for home, office, air travel, business trip, relaxation, meditation and insomnia. 2Listening to music without wearing additional earphones will give you a deep sleep and the perfect solution to sleep problems and you can use it everywhere. 3Using the updated Bluetooth 5.0 technology, stable connection, highspeed and longdistance transmission, low power consumption, bringing an excellent stereo experience. 4Builtin high quality battery charging for about 2 hours, providing about 13 hours of playing time, will not be awakened at night, you can sleep all night. 5The Bluetooth headset can be detached from the eyecup to facilitate cleaning of the eyecup and keeps it clean and hygienic, the perfect partner for sleep. 6Exclusive styling design, open the zipper and put in an ice pack, which can hold a hot or cold dualuse ice pack, and the builtin adjustable highquality speaker and microphone can realize handsfree clear call.