Check the listing for details. Gemini Gemini GPK-1000 Professional Karaoke Player w/Party Lights 19788143228 OB. Condition: Used. Listed at 216.97 USD. The Gemini GPK-1000 professional karaoke player unleashes the power of an all-in-one karaoke and entertainment system designed for you. Connect seamlessly via HDMI, dual Bluetooth, USB or AUX, and pair two units for an immersive experience with 150W of power and two 3" tweeters, plus a 10" woofer. Customize your sound with built-in microphone adjustments for volume, treble, bass, echo and reverb, and enjoy endless entertainment possibilities with DJ auto-tune, three DJ background effects and vocal reduce. Easily record and playback audio from multiple sources and enjoy 12 vibrant light effects for a visually stunning show. With EQ models like Rock, Flat, Classic and Pop as well as a bass boost switch and 3D effects, the GPK-1000 elevates your audio experience.