Mihappy Powerful 20w Bluetooth Speaker Built in 4400mah Power Bank (Black) With two 10W speakers, you will have great stereo sound quality and volume options. Compatible with all Bluetooth devices, the speaker will let you stream music from phones, tablets, laptops, as well as enjoy hands free calls. Controlling the playback is easy, with 4 large buttons right on the upper panel, and the stylish metallic exterior makes it perfect for a home or office environment. The perfect travel companion doubles as a power bank The speaker features a micro USB, USB and a micro SD card slot (supporting up to 32GB). All the ports are located on the side of the speaker and protected by a rubber cover, so that dust and other Two-channel stereo, 3D Surround Sound.