Products Description MT-510Maximum Output Power: 250W (4Ω Load)Total Harmonic Distortion:<0.5%Frequency Response: 35Hz-18kHzDriver Configuration:10" Woofer: 120mm Magnet, 35mm Voice CoilHorn Tweeter: 80mm Magnet, 25mm Voice CoilPower Supply: AC 220V/50HzBuilt-in Battery: 12V/7.2Ah ×1Wireless Receiver Module: UHF BandOptional Wireless Microphones: 2 units (handheld/lavalier/headworn)