Lego technic electric function switch - max. 24 motors to control - LEGO Technic, Mindstorms, Model Team and Scale Modeling - Eurobricks Forums
LEGO® Power Functions Control Switch 8869 | Other | Buy online at the Official LEGO® Shop US
High-tech Power Functions Servo Motor Polarity Switch Light Set Ir Speed Remote Control Receiver Battery Box Parts - Technic/electronic Blocks - AliExpress