The WHS-20 is a rugged, lightweight headset microphone, based on a high quality condenser element. The adjustable headband and gooseneck fit perfectly which makes the unit an excellent choice for all kinds of different applications: Aerobics instructors, Musicians, Teachers, … The unidirectional pickup pattern of the microphone isolates unwanted ambient noises and prevents early feedback. The mini XLR-connector makes it a perfect match with the JB SYSTEMS belt pack models WBP-1, WBP-2 and WBP-20 belt packs but also fits to belt packs of other brands equipped with a mini XLR-connector. Sensitivity: -67dB +/-3dB Impedance: 2.2kΩ Directivity: uni-directional Mic type: condenser mic Connector type: mini XLR Frequency Range: 100 – 16.000 Hz Operation Voltage: 1,5V (max. 10V) Current consumption: max. 0,5mA S/N ratio: >60dB Accessories: wind screen