Hornby R7292 HM6000 App Based Analogue Control - Hornby Accessories for 00 Gauge Track & Train Sets - Compatible with Select Hornby Model TrainsTotal Control: Introducing the HM6000, your new circuit (locomotive) controller. Paired with the new HM DC app, control up to 2 independent circuits per HM6000. Control up to 8 independent circuits per phone or tablet with more HM6000 units (max of 4 total) Train Set Freedom: Build your model train track how you want and give yourself full control over the way your model train set looks, sounds, and feels. Compatible with 00 gauge train sets