Item Type: Bluetooth Musical Eye Mask_x000D_ Material: Cotton_x000D_ Bluetooth Version: 5.0_x000D_ Transmission Distance: 20m/66ft_x000D_ Channel: Stereo_x000D_ Speaker Parameters: 32/10mm_x000D_ Signal to Noise Ratio: 104dB_x000D_ Rechargeable Lithium Battery: 150mAh (Delivered with Battery)_x000D_ Playing Time: About 13 Hours_x000D_ Talk Time: About 14 Hours_x000D_ Standby Time: About 300 Hours_x000D_ Charging Time: About 2 Hours1Three 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, high?speed and long?distance transmission, low power consumption, bringing an excellent stereo experience. 4Built?in 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 dual?use ice pack, and the built?in adjustable high?quality speaker and microphone can realize hands?free clear call. 1 x Bluetooth Sleep Music Eye Mask 1 x Charging Cable 1 x Manual