Bike theft alarms
I hope this question belongs here...
After having yet, another bike stolen from me (with entire load), I've decided to get some type of theft alarm for my latest bike. I live on my bike and can't afford to keep replacing my stuff. I scanned thru some of the site which Google brought up. I'm wondering if any of you have experience with any alarms which are NOT stupid phone operated? Meaning, regular battery alarms or key, or whatever. Any and all input is appreciated.