This Lima Battery Control is a must-have for any model railway enthusiast. It is compatible with OO gauge trains and has a voltage of 9V. The device is made of durable plastic and is a great addition to your collection of model railway accessories. Please note that this item is untested and its functionality cannot be guaranteed. It is being sold as is and the buyer assumes all responsibility for any malfunctions. Despite this, it is a rare find and a valuable addition to any collection.