WH1 module is basic (and simplest) controller for steering of trailer lights. Module "copy" signals of lights from car to socket of the trailer. For G7 socket there are available as "economically" set and as "complete" set.

WH1-G7
WH1 module is essential product for trailer lighting control. Module "copies" car light signals to a socket of the trailer. WH1-PRO-G7 kit is the most budget friendly set that includes socket for trailer connection.
suitable to the 7-pin plug of the trailer LED/bulb lamps support, PWM control trailer LED/bulb lamps support recognition of PWM steering of car lamps (analogue method) directly steering of fog-light of trailer
WH1-PRO-G7
WH1 module is essential product for trailer lighting control. Module "copies" car light signals to socket of the trailer. WH1-PRO-G7 kit is the most budget friendly set that includes complete wire harnesses, socket and accessories.
suitable to the 7-pin plug of the trailer LED/bulb lamps support, PWM control trailer LED/bulb lamps support recognition of PWM steering of car lamps (analogue method) directly steering of fog-light of trailer