Polsen OLM-10 Omnidirectional Lavalier Microphone (2 Pack) Self-Powered Electret Condenser Mic | Omnidirectional Polar Pattern | 3.5mm TRS Dual Mono Connector Sends Audio to Left & Right Channels | Accurate Voice Reproduction | Lightweight, Discrete Design 20' Cable | In-Line Power Switch | For Most Devices with 3.5mm Mic Input Includes Tie Clip, Windscreen, & Battery In The Box: 3.5mm to 1/4" Adapter, Tie Clip, Foam Windscreen, LR44 Battery, Limited 1-Year Warranty