LED Screen Vacuum Front Maintenance Tools LED Modules PickerLED Display Vacuum Front Maintenance Tool Hold the tool handle, and then align the suction at the center of the module, and press the switch button (the first time it is turned on, the second time is off). round Press to adjust the gear (the gear button has memory function). Gently pull the module out steadily, hold the module firmly with the other hand, and lightly press the switch button to turn it off. Remarks: If do not use it for long time,