In my opinion, this is one of the best compressor pedals. It has an old-school 3080 chip, true switch, internal trim pots for attack and trim.

Great sounding pedal.

From the google ai:
The MXR Custom Shop CSP202 Custom Comp is an all-analog compressor pedal featuring a rare CA3080 "metal can" IC chip for transparent, wide-dynamic-range sound. It includes external Output and Sensitivity knobs, internal Attack and Trim thumb wheels, true bypass switching, and RF-suppression components. [1, 2, 3]Core Design & Sound

• Uses a vintage-style CA3080 "metal can" IC for quiet, transparent operation.
• Delivers a warm, percussive punch and smooth sustain.
• Features all-analog circuitry with RF-suppressing components to reduce radio frequency interference. [1, 2, 3, 4, 5]

External & Internal Controls

• Output Knob: Controls the overall volume output of the effect.
• Sensitivity Knob: Adjusts the compression ratio and sustain amount.
• Internal Attack Thumb Wheel: Sets how fast the compressor reacts to your initial pick attack.
• Internal Trim Thumb Wheel: Fine-tunes high-end frequency response. [1, 2, 3]

Hardware & Power Specs

• True Bypass Switching: Keeps your dry signal completely uncolored when the pedal is off.
• Power Requirements: Runs on a single 9-volt battery or an optional 9V DC center-negative power supply (such as a Dunlop ECB003).
• Current Draw: Extremely low at approximately 3.3 mA