This super ultra compact & mini size portable speaker is a brand new product which will provide unbelievable loud sound and great bass. Size of just 3 inches, makes it highly portable to carry this wireless speakers in your jacket pocket. The built-in microphone makes it convenient for users to answer calls handsfree.Super ultra mini boost wireless portable Bluetooth speaker with incredible sound quality performance by a 3W speaker driver for rich bass, deep sound and low harmonic distortion. Up to 4 hours playing time with the built-in rechargeable 300mAh Li-pod battery. Fully recharge in just 3 hours using the included Micro USB cable.After successful pairing, the portable speaker can work as a wireless remote shutter when using together with your smartphone camera 3W speaker driver for rich bass, deep sound and low harmonic distortion.