PYLE PTA1004U 1000W 2-Channel Amplifier with USB/SD Readers and Built-In Crossover Total Power: 1000 Watt - Overload and Protection Indicator - Digital LCD Display - Double-Decoder MP3 Function Input Level: +4dB - Signal/Noise Ratio: 102dB - Cooling Fan: Two-speed DC Fan - File Compatibility: MP3/WMA SD Memory Card & USB Flash Drive Readers - Distortion: 1.0% - Inputs: Electronic Balanced; Barrier Strip ,XLR,TRS 1/4'' - 110/220 Volt Switchable 3.5mm Aux CD/MP3 Input Jack - Frequency Response: 20Hz - 20kHz &gt;0.5dB - Speaker Terminal: Speakons for Ch A, Ch B and Bridge; Binding Post Two Channels A/B - Bridgeable - Input Impedance: Balance 20kHz - 2x5 LED Indicator Red ,DDT / Clipping; Yellow, signal; Green ,power