JOMIGLI 3.5mm Unidirectional Dynamic Microphone with Desktop Stand 6.8 Ft Cord 1. No Batteries required. 2M 3.5mm stereo plug fits for all kinds of PC. Simply plug in and start recording 2. Karaoke Accessory. Special design for chatting over QQ, MSN, SKYPE and singing on the internet, also perfect for voice recording 3. Hi-fidelity dynamic microphone, Excellent reproduction of voice & Noise-cancelling 4. Uni-directional Dynamic Microphone - Flexible goose neck, support arbitrary bending 5. 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.