DAHLtronics ionWave Portable Rechargeable Bluetooth Stereo Speaker, Double Strong Speakers with Powerful Passive Bass, Built-in Mic for Handsfree Calls, NFC Support, 10 Hours Rechargeable Battery, HD Sound, Lightweight and Stylish [Aluminum Alloy Material] (SILVER) Supports Wireless Music Streaming via New Bluetooth v4.0 Technology and NFC Two powerful speakers with wide audio spectrum that produce crystal clear HD sound and Powerful Passive Bass Built-in Li-ion Rechargeable Battery for up to 10 hours of playtime, +350 hours standby Built-in Mic with True echo cancelling technology Compact and Portable Bluetooth Speaker, Elegant look and feel thanks to Brushed Aluminum Alloy Material with metal cut technology. And Lightweight and Compact design that makes it Highly Portable