Bluetooth Baseball Cap Unisex Leisure Outdoor Cap Music Hat<br>SpecificationsMaterial: CottonHat Size: One sizeNet Weight: 101gStrap Type: AdjustableApplicable Gender: UnisexColor: Black， Rose red， Khaki， Creamy White， Light Gray Bluetooth: V3.0+EDRFrequency: 2.4026GHz-2.480GHzTransmission distance: 10M \/ 32.80ftTransmission distance of Mic: &amp;le;1M \/ 3.28ftFrequency response: 85dbLi-ion battery: 3.7V\/200mA Charging time: 2 hoursCharging voltage: DC 5VStandby time: 30 hours or soContinuous working time: about 5 hoursBluetooth name: Call me Package Included1*Bluetooth Cap1*Charging Cable<br>More Details