Are these units compatible with more that one sensor (shock sensor/motion sensor etc)?
Yes, you can hook up as many sensors/sirens that you want to. With multiple sirens you will need additional relays but with most other items you will need special instructions on how to wire these up. Send an e-mail to our level 2 support team for information on how to do that. If you are interested in taking a look at the accessories that are available for this you can click here.