This is a unit that daily chains between TV and DVD player or Computer.  Allows you to sing to movies or tunes.   Does not REMOVE the other track but mixes with the existing audio.  Using YouTube you can use this like a pro Karaoke device. 

Unit is wired so provides excellent low noise and real digital reverb.  

• CONCERT IN THE LIVING ROOM: Just plug This Karaoke Microphone & sound mixer System between your TV & DVD player using HDMI cable / cord or Aux 3.5mm Input / Output for an Instant Karaoke Fun. This product is also ideal for Dj music & house party.
• DUAL MICROPHONE SETTING: This professional Karaoke Audio Mixer by Pyle can support up to two wireless handheld microphones and up to 2 wired dynamic mic so you can choose between wireless & wired.
• ADJUSTABLE ROTARY CONTROLS: Swiftly adjust the volume of your music, mics, echo, and tone to your desired level for this compact & portable preamp karaoke system is equipped with rotary control knobs for limitless ktv entertainment that both kids and adults can enjoy.
• COMPATIBLE WITH MANY DEVICES: This device Works with All of Your Favorite Devices like TV, Blue-Ray Player, Notebook, computer / PC, laptop, iPad, tablets, smartphone, DVD player, stereo, MID, Home Theater Systems, Receivers, Speakers & more.
• INDEPENDENT MIC VOLUME CONTROL: This Home Theater Karaoke Microphone System by Pyle features 2 separate rotary volume controls for mic 1 and mic 2 which allows you to adjust one of the 2 included wired dynamic microphone louder than the other.