Technology has moved on when it comes to controlling a 12vDC layout. There is no need for the controller to be tethered to the track as by utilising Bluetooth low energy (BLE) technology Hornby’s latest control system can now control a model railway layout with simplistic ease. Hardware HM6000 (BLE Unit) The HM6000 has the capabilities to operate up to 8 locomotives independently on a layout providing they are on individual circuits. Each circuit requires to be linked to a Bluetooth low energy (BLE) unit. Each BLE unit has two outlets enabling it to be connected to two individual circuits. Therefore, 4 BLE units would be required for 8 individual circuits. It is possible, however to still operate 8 locomotives using just one BLE unit via the HM6000 App but it would mean removing or adding to either one of the two circuits on the railway layout, individual locomotives so that there would only be one locomotive on each of the two circuits at any given time. The BLE unit is connected to the circuit using an R8206 Power Track (recommended) or an R602 Power Connecting clip. Each BLE unit will require its own transformer. TRANSFORMER NOT INCLUDED. Please purchase a compatible transformer separately: P9100(UK), P9101(EU), P9102(AUS), P9103(US), P9300(UK), P9301(EU), P9302(AUS), P9303(US) P9600(UK), P9601(EU), P9602(AUS), P9603(US).