This is definitely the flash pattern you want and not a constant flash.
I had this one already installed (found it on the old taillight)
https://www.amazon.com/Purishion-St...Z0P77SXK6SW&psc=1&refRID=YRVP741M4Z0P77SXK6SW
For a motorcycle you should consider one of these as well. The transmitter is powered from your bikes charging system, but you will need a low power battery for the LED lights on the helmet.
https://www.amazon.com/Wireless-Helmet-Brake-Light-Receiver/dp/B0042ASTT8
I had this one already installed (found it on the old taillight)
https://www.amazon.com/Purishion-St...Z0P77SXK6SW&psc=1&refRID=YRVP741M4Z0P77SXK6SW
For a motorcycle you should consider one of these as well. The transmitter is powered from your bikes charging system, but you will need a low power battery for the LED lights on the helmet.
https://www.amazon.com/Wireless-Helmet-Brake-Light-Receiver/dp/B0042ASTT8