Pyle 2X40 Watt Home Audio Speaker Power Amplifier - Portable Dual Channel Surround Sound Stereo Receiver w/ USB IN - For Amplified Subwoofer Speakers, CD DVD, MP3, Theater via 3.5mm RCA Input - PCAU22 2X40 WATT POWER: The Pyle Dual Channel Audio Amplifier is perfect for your home theater acoustic surround sound system. Gives you 2x40 watts power which can be used for multi speakers w/ 4-8 ohms impedance, enjoy high quality music & movies! MULTIPLE SOURCES: This personal portable digital amp box lets you connect high level external audio sources such as tuner, CD DVD player, tape deck, MP3, camcorder & VCR to the RCA L/R input & enjoy enhanced amplified acoustic audio reproduction! USB/LINE IN SELECTOR: The professional integrated stereo receiver features USB/LINE IN selector button to switch between input types. Press the button to set & play audio files from your flash drive, press again to release & allow line in devices. USB 2.0 INPUT: It features a USB input to support flash drives or similar USB devices w/ LED indicator beside the port. It allows you to play your favorite audio files from your computer's media library when you connect it directly to the amplifier. EQ CONTROLS: The improved compact bookshelf speaker sound amplifier features crisp & responsive buttons for power switch & MP3 controls - previous, next, play/pause. Rotary knob controls for master volume, bass & treble adjustments.