Today’s Groupon offers a Bluetooth sleep mask, sold by Romoss.
- It features Bluetooth music
- Easy to use and operate
- Material: 90% polyester, 10% cotton
- Color: gray or black
- Bluetooth version: V 5.0+ EDR
- Signal noise ratio(SNR): 86db
- Frequency response: 100Hz~20KHz
- Wireless operation range: about 20m
- Mic transmission distance: less than 1.5-2m
- Rechargeable lithium battery: 240mAH
- Micro USB charge: 5V/0.5A
- Continuous working time: approximately 8 hours
- Charge time: 2-2.5 hours
- Driver unit: 30mm
- Speaker sensitivity: 108db±3db
- Speaker frequency response: 20Hz~20000Hz
- Package content: 1 Bluetooth sleep mask, 1 charging cable
- Product dimensions:2cm x 10cm x 60cm
Note: due to the difference between different monitors, the picture may not reflect the actual color of the item.