Boss NS-2 Noise Suppressor, Effects Pedal for Electric Guitar, Eliminates unwanted noise and hum without altering the instrument's natural tone., Noise Detection Circuit precisely separates the guitar from background noises, Controls: Threshold, Decay, Mode (Reduction/Mute), LED: Effects On, Footswitch: Effects bypass, Connectors: Input (6.3 mm jack), Output (6.3 mm jack), Power adapter connector: oaxial power connector, 5.5 x 2.1 mm, negative polarity inside, Power consumption: 20 mA, Powered via a 9V battery or a 9V DC power supply (not included), Suitable power supply available under Article Nr #409939# (not included, must be ordered separately), Dimensions (W x D x H): 73 x 129 x 59 mm, Weight: 400 g