The Boya BY-M1 Lavalier Microphone is a quality lavalier with an omni-directional polar pattern and condenser element, well suited for general speech pickup in sermons, presentations, instruction, interviews, etc. The microphone"s detachable cable is easily replaceable in the event of a short or break. It can be used with virtually any wireless bodypack transmitter. The microphone ships in a protective storage case and includes a waterproof pop-filter, wind-muff and clip. Transduce: Electret condenser Polar pattern: Omni-directional Frequency Range: 65Hz-18 kHz Signal/Noise: 74dB SPL Sensitivity: -30dB +/-3dB / 0dB=1V/Pa, 1 kHz Output Impedance: 1000 Ohm or less Connector: 3.5mm (1/8") 4-pole gold plug Accessories: Lapel clip LR44 battery foam windscreen 1/4" adapter Battery type: LR44 Dimension: Microphone: 18mm H ×8.3mm W×8.3mm D Cable: 6.0m Weight: Microphone: 2.5g Power Module: 18g