This karaoke machine features 6 voice changer effects, including Male, Female, Echo, Chipmunk, Robot, and Radio effects. It can easily stream audio from any Bluetooth-compatible device and lower the main vocals on songs with the touch of a button. It also comes with two wired microphones for duets and multi-colored LED lights that synchronize with the music. Price drops from $51.03 to $16 with free shipping over $35 or adds $6.99.