Rightclick 12V Battery Backup Siren for Car Alarm, 120dB, Universal Fit, 1 Pack, Physical Keys + Intermediate Device (Car Alarm System)

Siren is smaller than you would think, however that's not all bad. This makes it easy to hide and install in a cramped engine bay. Postive or negative trigger is useful. Bracket at the bottom serves a purpose but I would have preferred the side mount clamp side at I think this would be stronger. The only negative is the key switch, seems weak and not that secure. Volume output is ok, it's loud but not ear blasting, to be honest at this price - fit two! Compared to others on the market, these seem the best option and would buy again.

This alarm siren is loud enough and easy to install