Part of the innovative new HM7000 range, this 21-pin Bluetooth and DCC sound decoder is perfect for getting newer 21-pin Hornby locomotives working on the HM7000 system. This decoder also has sound capabilities, the perfect pairing to a loco with a pre-fitted speaker or even for locomotives that can fit a small external sugar cube speaker. Item Length 2.95cm Item Height 1.55cm Item Width 0.5cm Item Weight 0.0025g, Manufacturer: Hornby Hobbies