Avjefes Tcm141t35 Beige Color Lavalier Microphone for Sennheiser Wireless Microphone System with 3.5mm Lock Screw Element: Electret Condenser, Pattern: Omnidirectional RoHs and REACH Complied. Without Pb, Hg, Cd, Cr6+, PBB, PBDE. Impedance: 1000 Ohm +/- 30% Operating Voltage : 1V - 10V DC Cord Length: 50 Inches