This upgraded power supply is for DC powered Gyrodecs, not the older AC powered ones. I believe the changeover happened somewhere around 2000 or so. 110V version. This one is in excellent condition and comes in its original box. You just switch out the old power supply for the new one. It takes just a few seconds to make a good improvement in speed stability, soundstaging, and general pace and timing. Buyer pays shipping. Paypal please add 3%.