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>