bluetooth beanie hat headphones unique christmas tech gifts fulllight tech fulllight tech bluetooth beanie offer you a different winter happy time.would be perfect gift choice as christmas stocking stuffers gifts for dad,wife,girlfriend,teens,boys,girls.</br> 1. enhancing battery capacity the capacity of battery from 150mah to 250mah,so it can work up to 16-20 hours.</br> 2. increase the max volume range from 60 to 110dp,so it makes it possible that you can listen to music clearly even in a noisy street;</br> 3. we adopt high bluetooth techonoly,which can support pair bluetooth enabled devices in seconds,and keep stable connections,while others' sound might cut in and out and difficult to connect.</br> 4. we add 0.02 lb knitting to make the beanie much warmer than others.</br> specification:</br> material:100% thick knitting</br> transmission distance: 10m(30 feet)</br> charging time: 2 hours</br> stand-by time: 60 hours</br> continuous working time: about 16-20 hours</br> hat size: one size fits most</br></br> frequency: 2.402ghz-2.480ghz</br> transmission distance of mic: about 1m</br> li-ion battery: 3.7v/250ma</br> model number: fulllighttechlmzxx02blflus</br>