The Boss PSA-230/PSA-240 Adapter 9V Power Supply is the only Boss recommended PSU power adapter to use to power your Boss effects pedal.
The Boss PSA 9V Power Supply can be used in conjunction with the Boss TU-2 or TU-3 Tuner and Boss Daisy Chain Lead to power up to 5 Boss pedals.
This power adapter is equivalent to the Boss PSA 230 ES.
Input 230v - 50Hz
Output 9v - 200mA
Manufacturer information
Roland Corporation Nakagawa, Hosoe-cho, Hamana-ku, Hamamatsu, Shizuoka 2036-1 431-1304 Hamamatsu Japan https://roland.cm/roland_support EU economic operator Roland Central Europe N.V. ENA 23 Zone 1 nr. 1620 Klaus-Michael Kuehnelaan 13 2440 Geel Belgium https://www.roland.com/backstage/login?redirect_uri=%2Fsupport#product_support