This is a genuine AC adapter AD-12JL from CASIO. Power-on check has been performed, and we have confirmed that it works without any problems. As it is a genuine adapter for electronic pianos and keyboards, it provides a stable power supply. This is a used item, so there may be minor scratches and scuffs from use, but there are no issues with its operation. Compatible Models: PX-100 PX-110 PX-120 PX-200 PX-300 PX-310 PX-320 PX-400R PX-410R PX-500L PX-555R PX-700 PX-720 In addition to the above, it may be compatible with other CASIO models that are marked as AD-12/AD-12JL compatible. Before purchasing, please check the rating label on the bottom of the main unit or the instruction manual to confirm compatibility. Manufacturer: CASIO Model Number: AD-12JL Condition: Working condition confirmed Used item Instant purchase is welcome. We will carefully pack and ship the item.