Features: 1.AC/DC adapter, 9V output(maximum current is 1A), 100?240V input, convenient to use. 2.Center negative (positive outside and negative inside) design, the connector plug is 5.5 x 2.1mm/0.2 x 0.08in. 3.UL certified over?current/short?circuit protection to reduce noise interference, safe to use. 4.Compatible with many electronic keyboards, digital pianos, effect pedals, amplifiers, etc. 5.Hook?and?loop cable ties are attached around the adapter for easy carrying. 6.115cm/45.3in cable length, enough to allow the connecting between device and the wall socket. specification:Item Type: Power Supply Adapter Material: ABS + Metal Color: Black Cable Length: Approx. 115cm/45.3in Output: 9V (Maximum Current is 1A) Input: 100-240V Output Mode: Positive-Sleeve, Negative-Center Connector Plug Size: Approx. 5.5 x 2.1mm/0.2 x 0.08in PackageList:1 xPower Supply Adapter NotePower output size is 2.1mm/0.08in.