The Boss NS-2 is a guitar effect pedal designed to produce sound modulations by applying effects such as noise-suppressor. To provide the musicians with an option to control the desired aspects of their instruments’ tone, this Stompbox unit is equipped with the following controls: threshold knob, decay knob and mode knob. This guitar effect pedal features jack input and jack output connectors and uses an AC adaptor/battery power supply that provide convenient usage.