DKnight MagicBox II Bluetooth 4.0 Portable Wireless Speaker, 10W Output Power with Enhanced Bass, Build in Microphone for handfree Phone Call (Blue) Implemented with 10W total acoustic drivers and ultra-small size produce a wide audio spectrum. The newly designed passive radiator could provide strong bass without distortion even at highest volume. Equipped with the advanced Bluetooth 4.0 technology, compatible with all Bluetooth-enabled devices (Bluetooth V2.1 and over). Same Size (6 x 2 x 1.6 inches) with the original MagicBox, but implemented with 10W total acoustic drivers and enhanced passive radiator. It could provide 30% louder volume and richer Bass than the original MagicBox. Built-in 2000mA Rechargeable Battery for up to 10 hours of playtime. Built-in microphone for hands-free speaker phone calling Easy to pair - No code/pin needed Easily to carry with, only 11.5 ounces.Plays all Audio devices through 3.5mm Aux in Jack.