Compact & Powerful : High Quality Certified Wireless Portable Is The Ultimate, High-Powered Portable Bluetooth Speaker With Powerful Stereo Sound. A Built-In Noise And Echo-Cancelling Speakerphone Gives You Crystal Clear Calls With The Press Of a Button. Support BT Music, BT Handsfree Call, LINE-IN, Remote Shutter Built in a stereo loudspeaker, a microphone. Tiny but loud, with super bass sound system. Li-ion rechargeable battery combine to power up to 3 hours(50% volume) of non-stop music. and the perfect design to bring the music anywhere.