Main Features:<br />One size fits for most devices with Bluetooth function<br />With Bluetooth headphones hiding in the hat， you can listen to music hand-free to outdoor sports<br />Press the button for 3 seconds to turn on the Bluetooth device<br />Adjustable belt with snap joint buckle， easy to fit your head circumference<br />Fashion and keeping warm with answering the phone in winter  <br />Set-in MIC and Li-ion rechargeable battery <br />1m transmission distance of MIC range<br />10m or so transmission distance<br />Charged by Micro USB <br />Clear and exquisite audio， obvious heavy bass effect<br />Control your music using the buttons on the headset<br />Suitable for varieties of outdoor sports<br /><br />Other Parameters:<br />Bluetooth: V4.0 + EDR<br />Li-ion Battery: 3.7V / 100mA<br />Frequency: 2.402 GHz - 2.480 GHz<br />Charging Time: 2 Hours<br />Stand-by Time: 60 Hours or so <br />Continuous Working Time: About 3.5 Hours<br />Power: 10mW<br />Impedance: 32Ohm<br /><br />    Specifications<br />General<br />	 Material: Taslon                                                  <br />                        Functions: Keep Warm， Decoration， Windproof， Sun protection， Stylish， Sun Block                                                	<br />Specification<br />	 Color: Black， Khaki， Gray                                                  <br />                        Product weight   : 0.070 kg                                                  <br />                        Package weight   : 0.200 kg                                                  <br />                        Product size (L x W x H)   : 27.0 x 18.0 x 15.0 cm / 10.61 x 7.07 x 5.90 inches                                                  <br />                        Package size (L x W x H)  : 22.0 x 17.0 x 6.0 cm / 8.65 x 6.68 x 2.36 inches                                                	<br />Package Contents<br />	 Package contents: 1 × Bluetooth Headphone Baseball Hat， 1 × Charging Cable， 1 × English Instruction Manual                                                	<br /><br /><br /><br />                                            <br /><br />                                                <br />