BOOMIN is a Bluetooth V4.0 compliant， low energy Bluetooth mini size speaker with incredibly big and clear sound and bass. It is compatible with most cell phones， tabs， PCs， notebooks and most devices with built-in Bluetooth. BOOMIN comes with an output power of 3 watts， and its classic shape matches well with the carefully chosen anodized aluminum alloy colors. It also comes with a detachable leather strip for easier carrying. With the built-in microphone， it can also be used as a portable speaker phone. The built-in battery can support up to 10 hours talk time and 3-5 hours continuous music play. It only measures 55.6(W)×73(L)×55.6(H)mm， compact in size but with great CD like music quality.