The on and off switch works the cable disconnect from the mic ok and I unscrewed the top of the microphone to make sure the condenser mic was not damaged by the previous people that returned it and that seems to be intact and was not damaged, very quiet stable microphone and seems to be a good manufactured product since I've never purchase from this vendor before
3.5MM Wired Unidirectional Headset Studio Conference Condenser Microphone
Description： TDM-100 is a mini speaker which is designed with unique and comfortable style.This microphone adopts electret condenser of high sensitivity, low impedance, anti-noise and jamming capacity. With fast and accurate data transmission,it’s guaranteed that the voice will be clear and stable.If you need a mini microphone,just pick it up quickly!
Features: A. Works with most devices with 3.5mm input B. Unidirectional Condenser Microphone C. Clear and Strong Sound. Portable and Unique Design D. Dual-core Universal Plug, Compatible with 99% Models E. Suitable for special recording, exclusive interviews, home, stage, musical instruments, computers, loudspeakers etc F. Memory reinforced frame,durable and adjustable. G. Wired microphone headset, bold reinforcement and durable