The AMT WS Clip-On Double Microphone System includes the WS Double condenser microphone and the BP40 Belt pack Preamp. The WS is a low profile double condenser microphone that attaches to the clarinet, alto and bass flute, or oboe with a Ultra- miniature low mass clamp. It is specifically designed for the timbre of the clarinet, The instrument microphone provides pure tonal reproduction while being unobtrusive. It has an even reproduction of sound across the entire instrument. The AMT WS features a flexible gooseneck, allowing the player to position the microphone for the best possible tone reproduction. It's rugged construction of anodized aviation aluminum makes it highly durable, while being lightweight and non-corrosive. The WS features one microphone at the bell and second positioned over the keys to provide a truer reproduction for the musical instrument's tone quality.The WS mic is terminated by a 3.5mm plug which connects to a belt pack preamp. The output is a predetermined mix balanced by the nature of the instrument. The included belt pack houses a volume control, contours the setup for the intended instrument, and powers the microphone system appropriately. A low Z cable and case is included.The AMT WS models including WSW, WS Studio, and the WS all come with TWO isolation rings now. Both microphones are suspended in AMT's iso-ring technology which allows more gain before feedback and less handling noise. Requires phantom power.