To provide a model device capable of adjusting lamps to an intermediate light quantity and producing time lag observed in a real car in turning on/off the light.

This model device is steered by radio signals from a radio controller (not illustrated) and provided with a plurality of lamps 28-31 controlled to be turned on/off by the radio signals. This is so constituted that a means 20a outputting a pulse train with a controlled duty ratio for turning on/off the lamps 28-31 at prescribed light quantities respectively and controlling the lamps 28-31 to be turned on/off at prescribed light quantities respectively by the outputted pulse train.