1.Keep your head warm, also can listen to music and make phone calls simultaneously.
2.Can synchronize with your mobile phone.
3.USB charging, do not have to worry about the problem of voltage.
Material: Acrylic fibers
Color: White+Grey, Red+Black
Transmission distance: 10M / 32.80ft
Transmission distance of Mic: ≤1M / 3.28ft
Frequency response: 85db
Li-ion battery: 3.7V/200mA
Number of charge: > 1000 times
Charging time: 2 hours
Charging voltage: DC 5V
Standby time: 30 hours or so
Continuous working time: about 5 hours
1*Bluetooth Knitted Hat