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 ; HD built-in microphone for phone calls, voice-enabled speakerphone, One-key call button. Multiple Play modes - Bluetooth, Aux-in, SD card, & USB drive player. WATER RESISTANT IPX5: Splashproof, rainproof, dustproof, sandproof; outdoor speaker.