Listen to your favorite songs from your Bluetooth enabled device through the crystal clear V7 Bluetooth wireless speaker. You will enjoy its 33 foot range, and hands-free speakerphone function allowing you to answer phone calls from your Bluetooth enabled mobile phone. The powerful 2.5 Watt speakers have a built-in passive radiator woofer for deep base. The USB rechargeable built-in battery provides up to 16 hours of uninterrupted sound while you are on the go. Thank to the power-bank feature you can even charge your mobile devices on-the-go such as iPad, iPhone, Smartphone or Tablet PC.