This is the classic model from Darkglass Electronics, the Microtubes B3K (CMOS Bass Overdrive). This is a quintessential pedal for modern bass sounds, known for adding aggressive distortion while retaining a thick core sound. It produces low-noise, clearly defined distortion, making it a reliable model in various genres. The toggle switch on the top of the unit allows for fine-tuning of the attack and low-end response. It's a pedal that cuts through the mix in a band ensemble and is easy to use in recordings. As shown in the photos, there are signs of use, such as scratches and marks, mainly on the back. None of these affect the functionality, and the pedal is in good condition for practical use. The operation has been confirmed before listing. All knobs, switches, and the footswitch are working correctly. With the price of new ones increasing, this is recommended for those looking for a battle-ready B3K. It's also recommended for guitar players. CMOS technology bass overdrive pedal. - Model: MICROTUBES B3K - Type: CMOS Bass Overdrive - Adjustment Knobs: LEVEL, DRIVE, CUT - Input Jack: INPUT - Output Jack: OUTPUT - Country of Manufacture: Finland - Power: 9V DC Thank you for viewing.