Bluetooth 4.2 Stereo Audio Dual Channel Power Amplifier, TPA3116 Amplifier with 24V 5A DC Adapter, Stereo Hi-Fi Digital Amp 100W x 2, Class D Integrated Amp with Bass & Treble Control (Amp+Adapter)

Please plug the power cord into the amp the wall, plug the audio cables into amp switch on. You need to connect the amp to the power supply first, then plug the power supply into the 110V AC outlet. Don't worry about the sparks, because this is class d amplifier, the capacitors need to charge when the power in, it's normal and safe. Amplifier parameter: Power supply range: 12V-24V THD: ? 0.5% Frequency Range: 20Hz - 20kHz (±3 dB) SNR: ? 95dB Input sensitivity: ? 280mV Bluetooth transmission distance: 28ft Terminating impedance: 2Ohm - 8Ohm Output power: 100W + 100W Input mode: Bluetooth and Analog Power adapter parameters: Input voltage: AC100 - 240V 50/60HZ Output voltage: DC24V 6A Output current: 6A Plug style: 5.5mm*2.1mm Output line length: 1m Input line length: 1m Package Includes: 1 x Digital Amplifier 1 x US Power Adapter 1 x Power cord