Powerful speakers with breadth-taking strong BASS and surround sound.1*93mm + 2*66mm Loudspeaker, Bi-amp, Passive radiators. Very long-lasting battery life for longer music play. Advanced Wireless Technology – perfect for all Bluetooth devices. Compact & Portable – easy to carry, Perfect for home and outdoor events. Handsfree Call ; built-in HD microphone for phone calls, voice-enabled speakerphone, One-key call button.