Sony ECM-CS10 Tie-Clip-Style Omnidirectional Business Microphone Lavalier styling -- includes a clip to attach to clothing; permits convenient, hands-free recording Small, inconspicuous -- makes the recording process more natural and less obtrusive Integrated clip for maximum simplicity & ease of use Omni-directional pattern -- picks up voices from all directions; ideal for meetings and lectures External (plug-in) power only