Controls and operation - Short press this button to turn on/off the LED lighting. - Long press this button for 2 seconds to switch to 650 nm red light flashing. - Press for another 2 seconds to turn off the red light flashing function. - When the red light is turned off, the working state of the 650 red at the time of shutdown is automatically saved. Key benefits - Simple one button control simplifies use and improves workflow. - 650 nm red light flashing provides a clear visual cue for signaling or focusing on low light tasks. - Automatic state save preserves the last operating mode for quick resume next time. - No complex setup needed; operation is intuitive and responsive. Applications and use scenarios - Detail inspection of small components or surfaces in dim environments. - Maintenance or setup tasks where a flashing red indicator enhances visibility or attention. - Situations requiring a quick on/off LED with an optional red flashing mode for signaling or emphasis. Notes on operation - The device uses a single control button to manage both the LED lighting and the 650 nm red flashing mode. - The red flashing mode is activated by a 2 second long press and deactivated by another 2 second long press, after which the current state is saved automatically.