ITEM NAME:5 Pcs Of Travel Switch Collision Switch Limit Switch For for Arduino Raspbe J6C2 5 Pcs Of Travel Switch Collision Switch Limit Switch For for Arduino Raspbe J6C2 A switch module installation forefront of collision, the module output low, there is no collision, the output high. Module reserved M3 mounting holes for easy fixing in a small car. with a light switch, there is a collision, lights, no collision lights out. colour:Blue Material:plastic size:2.5*1.9cm Package Contents: 5*Collision switch.A switch module installation forefront of collision, the module output low, there is no collision, the output high. with a light switch, there is a collision, lights, no collision lights out. 5 Collision switch.