White Noise Bluetooth5.2 3D Eye Mask Wireless Music Sleep Headphones with Timing Function(Black)

Features: 1. 3-in-1 sleep white noise eye mask, 3D sleep mask and wireless BT headset. Built-in microphone so you won't miss any incoming calls. 2. 8 white noise: ocean sound, stream sound, light thunder, fine rain, bird song, firewood, seagull, thunder sound, sounds pretty good enough to get you into a relaxed state. 3. 5.2BT& HD Stereo: Featuring V5 technology, its components produce deep bass and clear treble for incredible sound quality. Automatically reconnects to your BT device when powered off 4. Ergonomically based sleep eye mask fits your face. It has great padding and a 3D form that doesn't put any noticeable pressure on your eyes. 5. Stretchy hook and loop fastener design can adjust the headband, suitable for head size is 22.4 inches - 24.8 inches. 6. Suitable for travel, yoga, napping, shift work, relaxation, meditation, hotel stay or home use. Parameters: 1. Material: memory foam + ice milk silk fabric 2. BT protocol: V5.2 3. Frequency range: 20HZ-20KHZ 4. Charging voltage: 3.7V-4.2V 5. Sensitivity: 88DM 6. Signal to noise ratio: 90db 7. Speaker impedance: 32- 15% 8. Speaker specification: 30mm diameter 9. Working range: 10m 10. Charging time: 2H 11. Use time: 10-13 hours 12. Auto-off timer: 30, 60 or 120 minutes 13. Battery capacity: 200mAh lithium battery