3.Unlimited life: charging by by external replaceable battery, computer via USB interface, or through USB adapter.
4.When there is a call incoming, you can a key to answer or hang up the phone.
5.You can enjoy high quality music anytime through bluetooth, U disk, AUX input or TF card.
6.Designed with bass speaker, bring you very loud, clear and shock sound.
Battery: 3.7V 400mAh