There were four types of transformers available – the AC version was originally available for the Vibrator-motored cars with either an input voltage for the UK market or a corresponding one for the overseas market Subsequently DC versions for both markets were manufactured which had twin outputs. Since the invention of the first constant-potential transformer in 1885, transformers have become essential for the transmission, distribution, and utilization of alternating current electrical energy. Each Transformer was supplied in a special corrugated cardboard box with a White gummed paper label having Blue printing identifying the type and voltage of the transformer.
- AC 1 – 200/250V – Output 16V AC
- AC 2 – 100/125V – Output 16V AC
- DC 3 – 200/250V – Outputs 15V DC
- DC 4 – 100/125V – Outputs 15V DC