Avjefes Tcm128s Lavalier Recording Microphone 3.5mm Connector with On/off Switch Element: Electret Condenser with Pattern: Omnidirectional RoHs and REACH Complied. Without Pb, Hg, Cd, Cr6+, PBB, PBDE. Cord Length: 19 ft Impedance: 1000 Ohm +/- 30% Package Included: Windscreen Tie Clip, 3.5mm TRS to 1/4" TS adapter & LR44 Battery