The Icom AD-55NS is the matching AC power supply for the IC-R8600 receiver.
It provides filtered, regulated 15 VDC at 2 Amps. Includes removable AC cord.
This switching-type power supply does emit a bit of R.F.I. (interference), and is not suggested for those using an indoor or nearby antenna.
Be sure to insert the supplied short connector into the radio's rear panel if using the AD-55NS.