Cateye Alarm deterent for Catalytic converter

The Cateye is an intelligent, SMART controller that senses human motion under your vehicle. It activates a 130dB computer-generated multi-pitch siren and then automatically deactivates when they leave. While it draws attention like a traditional alarm, its additional purpose is to turn the confined space beneath your vehicle into a painful echo-chamber by intensifying the sound levels - forcing the thief out before damage can be done.
De-Arms when engine ON, Re-Arms when engine OFF,
(no need to manually activate)
The Cateye works by using a specialized motion sensor that detects motion under your car. The Cateye is programmed to require 5-15 seconds of "sustained, purposeful movement" to avoid false alarms (e.g., small animals and random debris). It verifies the threat and only then does it activate the alarm. It can "see" from 1 to 20 feet, and has a 140 degree field of view, so it covers the entire area under your car. 
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Comes with remote.