ITEM NAME:Wired 3.5mm Jack Headworn Microphone Mic for Voice Amplifier Loudspeaker Description: 100% brand new and high quality 3.5mm Thread Plug Ideal replacements for original headband microphones Frequency: 20Hz-20kHz Sensitivity: -44dBÂ ±4dB Operating Voltage: DC 2V Cable length: 1.2M Package Includes: 1 x Voice Headworn Microphone SKU: ALU0017362757002932.1 x Voice Headworn Microphone. 3.5mm Thread Plug. SKU: ALU0017362757002932. Frequency: 20Hz-20kHz.