Any Successful Event Requires Heavy Duty Speakers that are Powerful Enough to Reach the Entire Audience. These Speakers Deliver Durability, Flexibility, and Outstanding Audio Performance with Exceptional Range.The Speaker System is Perfect for Home Entertainment, Seminars, or Any Other Venues and Events. 8" High Efficiency Woofer. Built-In BT Receiver Allows You to Wirelessly Connect to your iPad, iPhone, iPod, Smartphone & More. USB/SD Inputs Allow You to Connect Your Non-BT External Audio Devices and Charge Then at the Same Time Via the USB. FM Radio. Volume/Bass/Treble/Mic Volume. 2 Mic Inputs (1 mic included).1 Guitar Input. Remote Control Included. Built-in Handle and Wheels for Easy Transport. System Type: 8". Frequency Response: 70Hz-18KHz. Sensitivity (1w/1m): 88dB. Impedance: 4 ohm. Peak Power Capacity: 250Watts. RMS Power: 25W. Crossover: 8KHZ. High Frequency: Piezo Tweeter. Low Frequency: 8" Woofer. DC: 1.5A/13.5V Adapter Power Supply.