I tried one off eBay that was $20, now it’s on there for $29... it is also a 2 wire and has no antenna. So, with that said, it plugs right in and works fine if you just want a siren and don’t mind it chirping on arm/disarm. But I tried everything in the world to put it in chirpless mode and thought I was going to wear out the ignition switch trying. A neighbor has the same one, also could never get it into chirpless mode either. If you want to add a pager, these sirens will not work for that. But for a siren it’s fine.
The HD siren has 3 wires and an antenna... the pager communicates with the security system on the bike through the HD siren, and vice versa. Also switching between chirp/chirpless modes takes just a few seconds with the HD siren.

 

I installed the Smart Siren 2 on my RGU. I also bought the rechargable pager. Problem I am having is after 1 hour the pager shows I am out of range. This occurs even if the pager is about 5 feet away from the bike. We have changed out the pager and the siren and still does it. Anyone ever experienced this before?

 

Look at page 11 on the attached PDF, the Range indicator light goes out after one-hour to conserve the battery.

 

Thank you very much. That explains what has been going on