or 
Boss PSA240
The Boss PSA240 AC Power Adaptor is the recommended power supply for several BOSS products. Including the BOSS Compact and Twin pedals; ME-50/-20/-20B Multi-effects; the DB-66/-88/-90 metronomes; DR-Series drum machines; FC-Series foot controllers; MC-202; SH-101; SP-202; TR-626; and all TU-Series tuners.
Features
New generation power supply for today’s digital instruments
500 mA of current to easily power multiple pedals, even digital ones
Furthermore, the power cable length on the PSA240 is increased to almost 10 feet (3 meters)
Additionally, an LED indicator gives you quick visual verification of on/off status
While the new design does not cover adjacent power outlets
Overall, this Boss PSA Adapter (PSA240) is the perfect way to power your Roland and BOSS effects pedals and processors.
Input Voltage
100-240v 50-60Hz
Output Voltage
DC 9 V
Maximum Current Output
500 mA
