The POWER UNIT No 1 by INTERNATIONAL MODEL AIRCRAFT LTD is a model railway accessory designed for enthusiasts looking to control the speed and direction of their trains. This untested unit is specifically designed for use with OO gauge model railways, providing a convenient and efficient way to power and control your locomotives and carriages. With the brand's reputation for quality and reliability, this power unit is sure to enhance your model railway experience. Small crack on the front of the unit not tested but came from a fully working setup