Kyosho MZW429 Light Unit Set grants your model working headlights and taillights for improved realistic appeal. The functionality is achieved through a trim knob for the light on the KT-19 transmitter which enables you to adjust the flashing rate of your headlights, giving you control over the aesthetics of your model. Installation is straightforward, but be sure to remove the battery for operation before assembling or disassembling the chassis. Ensure the proper connection of the wires, as reverse connection can cause damage to the connector.