Sunsent Bluetooth Beanie Cap with Sterreo Headphone Headset Speaker Wireless Mic

Set-in Li-ion chargeable battery, charge via USB Cable, long stand-by time.
Specifications:
Bluetooth Version: V3.0+EDR
Frequency: 2.4026GHz-2.480GHz
Transmission distance: 30 ft or so
Transmission distance of MIC: ¡œ3 ft
Li-ion Battery:3.7V/120mA
Charging time:2.5 HRS
Standby time:60 Hrs
Continuous working time: about 5Hrs
Bluetooth name:Magic Hat
Size:Fits for head circumference 56-62cm
Speakers can be taken off so that you can wash the hat