Make your next performance a duet with the Singing Machine Uni-Directional Dynamic Microphone. Plug the mic into an available microphone jack on your karaoke machine and get your friends and family in on the fun! This Singing Machine Uni-Directional Dynamic Microphone features Wide-Frequency Response and High Sensitivity to add the power to your power-house performances! Features: No Batteries required Karaoke Accessory Uni-directional Dynamic Microphone Wide Frequency Response & High Sensitivity NOTE: While using the product please make sure that the music playing machine is properly on and the input jacks work correctly. Microphone s wire should be properly fitted to the machine so that there is no disturbance or issues. Also ensure that the that the power is on.