Singing Machine Unidirectional Dynamic Microphone with 5 Ft. Cord Designed for all singing machine karaoke systems and computers Durable zinc alloy metal construction, long time using Uni-directional microphone pattern, minimize the surrounding noise Powered by it's own jack and no batteries required 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.