Bluetooth sleep mask BT-01 has binaural stereo with sensitivity of 108dB and active noise cancelling, comfortable cotton fabric and bluetooth 5.0 connectivity.
You can comfortably use mask up to 10 hours on one charge (charging time is about 2 hours)
For people with sleep difficulties, it can let them slowly go to sleep while enjoying music, and can also reduce the outside world's noise.
The noise disturbance provides a quiet sleeping environment. Bluetooth sleep mask can help improve sleep quality.