Simultaneous flash LEDs are a custom-made item.
What we have done is take 2 of our regular SMD LEDs and added them to the same flash circuit. The LEDs will be on 8" fine wire so they can be up to 15" or so inches apart
The listing is for TWO, THREE, or FOUR of the same color and same size LEDs. These synchronized LEDs will flash or flicker or breathe all together.
If you want different colors or sizes flashing, breathing, or flickering together, select the custom button above to tell us which colors you want to combine into your one circuit. ***
For the Flashing options, the same flash rate applies to all LEDs on the circuit. Below are the Flash Speeds
Fast 
Normal 
Slow 
We custom make these here on a per order basis so please allow a few extra days lead time for these to be made and sent.
"What do I need to run these?"
| 3 volt use |
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Our |
| 5-12 volt battery / regulated adapter |
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Your own battery, or for 9 volt get our |
| Your own AC/DC or DCC supply: 7-19V |
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7-19 volt Universal AC/DC/DCC lights |