This is a 9V fixed-voltage MyVolts-branded power supply designed to meet exactly the power specification of your Roland GI-20 GK MIDI interface.Specifications: – Output voltage is 9V – Max. output amperage is correct for your device – Output tip is the right size and specification – we’ve tested it thoroughly – 2 pin plug for use with US (Type A) wall sockets – Input voltage is 100-120V AC, 50/60HzIn addition, this myVolts-branded replacement power supply for Roland GI-20 GK MIDI interface is: – Compliant with all safety standards, and features overvoltage, overcurrent and short-circuit protection to protect your device from damage – Energy Star level 6 approved, guaranteeing more efficient delivery of power to your devices, at less cost to you – RoHS and CE-certified – Covered by a 2 years’ warranty: if the power adaptor fails within 2 years from purchase, we’ll replace it, no worries.