LEGO MOC Switch by BD Technic | Rebrickable - Build with LEGO
LEGO Power Functions Control Switch (16517 / 61929) | Brick Owl - LEGO Marketplace
Deluxe Magnetic Switch and Control Adapter Board for LEGO | Brickstuff
MOCI RC Engineering Crane Building Blocks, for Liebherr LTM 11200, with 14 Motors, 1* Switch, 2 *Extension Cables, Small Particle Compatible Lego Technic, 8528PCS, Red, 148 x 54 x 29cm (10656742NGW)