Here is a somewhat cheaper alternative.
It includes 5 types of lighting, fast blink, slow blink steady etc.
Motion activation of light on a rechargeable battery, brake indication.
Motion alarm 115 DB,(which is why I bought mine), 3 horn sounds, remote dongle or attached button operation, daylight sense and good ratings on Amazon. Whew !
I have had mine over 2 years and it's still working great.