Amazon.co.jp: K.E.S KACA-1 9V Power Adapter : Musical Instruments
9V AC/DC Power Supply Adapter 500ma (0.5 amps) AC to DC Electric Transformer Inverter for Small 9-Volt DC Electronic Devices Under 0.5a - Walmart.com
9 Volt DC, 500 mA Power Adapter with 5.5mm Barrel Jack (Center Positive)
Amazon.com: D'Addario Accessories PW-CT-9V DC Power Adapter – Pedalboard Power Supply - Minimize Need to Change Batteries on Pedalboard and Devices Requiring 9V – 800mA Max Current – Guitar Pedal Power Supply :