Hunter Indoor Controller Plug in Transformer - 526500 The Hunter transformer you will receive will be Hunter's official replacement. It may have a different label, but it Hunter's most recent and only indoor transformer for all their timers. Will work with Pro-C, PC-300i, PC-400i, PCC600i, PCC900i, PCC1200i, PCC1500i, SRC and X-CORE Will work with ANY manufactures timers that needs 24VAC output