Amazon.com: Sondery Boost Pedal for Electric Guitar and Bass, Mini Clean Booster Effect Pedal, True Bypass, More or Less 14dB Change for Frequencies Under 250Hz or Above 1KHz, Art Design Foot Pedal :
Vivlex LEF-318 Boost Guitar Pedal Analog Mini Overdrive Booster Clean Boost Pure Boost Pedal for Electric Guitar Bass with True Bypass Switch, Full Metal Shell, True Gain : Amazon.co.uk: Musical Instruments &
Amazon.com: Sondery Boost Pedal for Electric Guitar and Bass, Mini Clean Booster Effect Pedal, True Bypass, More or Less 14dB Change for Frequencies Under 250Hz or Above 1KHz, Art Design Foot Pedal :