Using the Kato Smart Controller, take control of your standard DC trains with hands-free throttle operation using your smart device′s Bluetooth connection. Better still - when paired with the Kato Sound Box, the Smart Controller gives you control over all of the Sound Box′s functions - from the sound controls themselves down to the sync and volume adjustments. Everything the sound box can do - you can too, from the palm of your hand! The Kato Smart Controller can pair with any Android or Apple Device using a free app that can be downloaded from the Google Play or Apple iTunes Store! Simply activate your phone or tablet′s bluetooth connection, turn on the Smart Device Controller, push the ′pairing′ button, and open the app - the app will do the rest, pulling up the ID of your local Smart Device Controller on a list and giving you full control over your layout′s throttle and directional controls! Requires Android 5.0 or later, iPhone 5 or later, iPad pro, iPad 4th generation, iPad Air/Air 2, iPad mini 2 or later model.