Bluetooth Hybrid Stereo Amplifier Receiver with AM/FM Radio, Digital LCD Display, USB/SD MP3 Playback, Multi-Channel Source Audio Selection, Dual Microphone Inputs, Subwoofer Output, AUX and RCA Connectors, Headphone Jack, LED Backlight, Cooling Fan, Rack-Mount Design, Remote Control, and Audio Adjustment Controls for Home Theater, Karaoke, and Music Entertainment