Reference:
M300
Electret lapel microphone (levalier) with built-in clamp and 2 m cable. Omnidirectional. Output impedance 1,000 ohms at 1 kHz. Frequency response 60 ~ 16,000 Hz. Sensitivity -65 dB at 1 kHz. 6.35 mm jack connector to connect to amplifier. Metallic, black color. Gold metallic battery holder.