This LED flash is very bright, highly visible in daylight and has 13 flash modes. This 12 volt device has a switch near the power connector side and next to it is a small toggle switch that you press to cycle through to the next blinking pattern. The only downside is that the switch doesn't have a display that shows the pattern you've chosen. My solution was to make a list of the different patterns on my phone and number them so I knew how many times to press the button (the device remembers the last pattern you selected when you turn it off ). Overall I'm happy with this lightweight device and it does what I need it to do.
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