Bluetooth BT-669 stereo Equalizer AmplifierBluethoot amplifier equipped with several integrated functions such as the ability to connect 2 Microphones for karaoke, listen to FM Radio, play mp3 files, and the ability to connect via Bluetooth to devices such as smart phones or tablets. Equipped with USB Port and SD card slot from which we can read and listen to our favourite music, or play the basics to sing with karaoke. Use for powering Home Theatre Systems, Ceiling Speakers, Wall Speakers, underground speakers, and other low power speakers. On the front there are controls for playing tracks, a display and knobs for volume controls. Everything can also be managed using the supplied Remote control.