Specification: Item Type: Silk Bluetooth Musical Eye Mask_x000D_Material: Silk_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 350 Hours_x000D__x000D_Charging Time: About 2 Hours Features: 1Silk material and skin?friendly, very comfortable to the touch, improving sleep quality and small in szie, durable and portable, you can use it everywhere. 2The 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. 3Using the updated bluetooth 5.0 technology, stable connection, high?speed and long?distance transmission, low power consumption, bringing an excellent stereo experience. 4The 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. 5The 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. 6The 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. PackageList: 1 x SilkBluetoothSleep Eye Mask 1 x Charging Cable 1 x Manual