This 2.1-channel Hi-Fi amplifier features an aluminum alloy chassis and supports connection to two speakers and one subwoofer. The Rms output power is 20W x 2 + 40W, with a peak power of 200W + 200W. The product requires a Dc 12V power supply a power adapter is not included in the package. Please provide your own Dc 12V/2A power adapter with a Us standard plug. Its low-distortion design delivers clear and powerful sound quality, with a frequency response of 20-20kHz, a signal-to-noise ratio of 80dB, and impedance compatibility with 4-8 ohm speakers. Note: This product does not support Bluetooth connectivity audio input via a cable is required. Its compact size makes it suitable for car audio upgrades or home desktop audio systems. The package includes the amplifier unit and instruction manual.