The following is the recommended Power Supply for the GT-1.
BOSS PSA series (PSA-100/120/230/240)
Note: The GT-1 draws approximately 200 mA of current. If you plan to power additional effects from the same AC adaptor (for example, using a daisy-chain cable), use an AC adaptor with sufficient current capacity, such as the PSA-S or PSA-S2 (500 mA output).
Important:
Voltage and plug types differ by region. Use a regionally compatible adaptor that matches your local power specifications.
Voltage and plug types differ by region. Use a regionally compatible adaptor that matches your local power specifications.
Caution: The use of any other power adapter may cause malfunction and/or damage to the product.
Batteries: Dry Alkaline batteries (AA, LR6) x 4