Auto barrier warning with alt flashing red lights 4mm Scale

Earlier style of barrier warning light in 4mm scale with a pair of alternative flashing red lights on each side of the crossing. An approaching train actuates the warning lights which are switched off automatically as the train clears the crossing. Supplied complete with operating unit, reed switches, one magnet, colour coded wiring and assembled and wired barrier warning lights. Supplied with full instructions for Bi Directional or Double Track working. Requires a 12V DC power supply, or can be operated from a 9V pp3 battery for which a connector is supplied.