DITOP Universal Tie-Clip Microphone / Clipper Microphone For Voice Amplifier / 3.5mm Hands Free Computer Clip on Mini Lapel Microphone - 3.5mm Jack Plug (2pcs  Lapel Microphone) 3.5mm Hands Free Computer Clip on Mini Lapel Microphone Plugs into a standard 3.5mm jack. Lightweight and handsfree 30 days Warranty After Sales: The products can be returned and exchanged within 30 days if any quality problems exist. Supported Windows XP, 2000, 98, ME, and Vista