The Kato Standard SX Power Pack is designed to keep your HO and N Scale standard DC trains running smoothly. Revised in 2018, this power pack is 100% compatible with all Unitrack electrical accessories and is an in-kind replacement for previous Kato power packs. It is also upgradeable with alternative AC adapters that will allow greater output for larger layouts (sold separately). The Standard SX includes the controller with speed knob and reverser lever and also matches the pack supplied with M1 and M2 Master Series Oval Sets (sold separately).