The LAMAX Flow1 Bluetooth speaker will bring a strong bass and bright high tones that will delight every music fan. And all without the need for a single cable! Wireless Bluetooth technology lets you play music from a compatible phone or mp3 player. The LAMAX Flow1 Bluetooth speaker has a cool frequency response range from 20 Hz to 20000 Hz. The total power performance of 30 W guarantees quality sound even in a larger living room. The built-in battery gives 6600 mAh, therefore you can enjoy the fun for 20 hr(s).