Boston Audio BA-3300K Digital Key Control Karaoke Mixer. This is in good condition and works great. It has been tested and works perfectly. Please see photos for cosmetic detail. A cheaper option may be available based on your location and service selected. This way you end up paying exactly what it costs and not overpaying if you happen to live much closer to us. The item “Boston Audio BA-3300K Digital Key Control Karaoke Mixer” is in sale since Monday, August 12, 2019. This item is in the category “Musical Instruments & Gear\Karaoke Entertainment\Karaoke Mixers”. The seller is “thingsbazaar” and is located in Chandler, Arizona. This item can be shipped worldwide.