Custom home security systems by Brinks or Tyco are typically expensive affairs, leaving frugal, hyper-cautious folks to DIY their home security systems-which often amounts to nothing more than fish hooks hung from the ceiling at eye level. That was until the Lasershield. This easy-to-use home security system consists of a central alarm that jacks into a landline and wirelessly connects to a laser-powered motion-detector. Once armed by a keychain remote, the alarm is easily tripped by untoward rustling-whether it’s a kicked-in door, a broken window, or your cat getting stuck on the ceiling fan. If the system isn’t disarmed within 20 seconds via the remote, the klaxon sounds and the system notifies its $20 per month monitoring service.