Velcro on back.

This is the one i've been using on my pedalboard since 2020. Minor scratches but very clean. Velcro on back.

OC75 Treble Booster - Rangemaster Style Germanium Pedal with top quality components.
This pedal is based on the classic Dallas Rangemaster Circuit that was popular back in the late 60's and early 70's. It boosts the higher frequencies of your guitar's signal for a tighter more focused sound. Great for driving a tube amp or in front of your favorite distortion/drive pedal. It adds sustain, harmonics, and some nice grit from the single NOS black glassed PNP germanium transistor biased to measure -7.0v on the collector. It also reacts well to picking dynamics and cleans up nicely by lowering your guitar's volume knob. The pedal has a rotary switch which selects between 8 different tone options including the Rangemaster standard. First position is a bit more trebly than Rangemaster standard, second position is the Rangemaster standard and the others are gradually more bassy. This makes the pedal very versatile and easy to stack with overdrives and fuzz. Clean well too!
This pedal's circuit contains a voltage inverter which enables you to use a standard (Center Negative) 9V adapter.

It’s recommended to disconnect the input jack when not using
the pedal to save battery.

Features

• Rare genuine NOS Mullard OC75 germanium transistor
• One knob to increase the boost.
• True Bypass
• Vintage, warm and creamy boost
• 9V center negative power supply so it can be used in line with other pedals.
• 8 positions rotary switch for different tone options
• The board has a biasing pot to refine the transistor's biasing.
• Top mounted jacks
• Battery snap