100% Acrylic material?? knitted beanie?? soft and warm.</br>V3.0+EDR Bluetooth version??available for most of devices with Bluetooth function.</br>You will look great and keep warm while litsening to your favorite music.Keep the sound track to your life playing all the time.</br>Perfect sound quality and super bass effect?? you can enjoy your music while you are walking?? hiking?? jogging?? skating?? fishing...Keep you warm in chilly days.</br>Large battery life gives it 60 hours standby time and 3.5 hours talk time. Then easily recharged by Micro USB (charging cable include).</br></br>Product Description</br></br><b>Introductions:</b><br><br>color (black grey) 1.Bluetooth: V3.0+EDR <br> 2.Frequency: 2.402GHz-2.480GHz <br> 3.Transmission distance: 10M or so <br> 4.Transmission distance of MIC: ???1 M <br> 5.Li-ion Battery: 3.7V/100mA <br> 6.Charging time: 2.0 hours (first time should 2.5 hours) <br> 7.Standby time: 60 Hrs so<br> 8.Continuous working tim