Review on 🎤 GOODaaa Wireless Bluetooth Karaoke Microphone - Portable 4-in-1 Handheld Karaoke Mics Speaker Machine with Dual Singing for Kids and Adults - Perfect for Home Parties and Birthdays by Chris Shepherd

Works very well. I wasn't entirely sure how it works before I bought it, but turns out you plug it into your phone and the music you play on your phone comes out through the microphone's speaker and you sing over it. And it gets really loud! One killer feature is a switch on the mic that allows (or comes close to) removing vocals from any music being played, leaving you with just a background track. The microphone looks great and is very durable, was also impressed by the professional packaging.