When the filament cross over the module, and press the switch, it will enter the high level and the lights are off. When there is no filament, the switch will get bumped, then it will enter low level and the light are on, the buzzer rings to give you tips. At such situation, you add the filament and it will continue printing.
- 1pcs*MKS FES module
- 1pcs* MKS 3pin cable