For UK / Hong Kong with 230 to 240 Volts input. You will need to add your own wall plug. See pictures for details.
MINIMODELS SMOOTHFLOW SPF240 SCALEXTRIC 12 VOLT & 240 Volt INPUT TRANSFORMER og
Minimodels Smoothflow 12V DC Transformer Scalextric or Hornby Railways TESTED
Minimodels Smoothflow Power Transformer Unit For Scalextric
Vintage Minimodels Smoothflow SF1/R 12 V 2 Amp Power Supply - scalextric, Boxed
Vintage Minimodels Smoothflow SF1/R 12 V 2 Amp Power Supply - OO Gauge Railway