INV 2900 The TC Electronic Forcefield Compressor is a classic compressor/limiter guitar pedal with a vintage all-analog circuit design, providing both subtle sustain and hard-knee compression. Here are some key features of this pedal: True Bypass: Ensures signal integrity when the pedal is off. Three Control Knobs: Sustain, Attack, and Level. Endless Sustain: Offers ultra-stable dynamics, making it ideal for maintaining consistent volume and tone. Power Options: Can be powered by a 9V battery or an external 9V DC power supply. Build Quality: Robust metal chassis built to withstand heavy use. It enhances various styles of tonal expression, from blues to rock to country, and is known for its warm, smooth compression.