Amazon.com: MyVolts 9V Power Supply Adaptor Compatible with/Replacement for Korg GT-120 Tuner - US Plug with Extension and ON/Off Switch : Tools & Home Improvement
Amazon.com: SLLEA AC/DC Adapter for KORG GT-3 LCA-120 GT-120 Chromatic Tuner Guitar/Bass Power Supply Cord Charger Mains PSU : Electronics