just question that came to my mind now
A watch! It's like a clock, only you wear it on your wrist. They usually come complete with some sort of mechanism to attach it to the wrist, called a strap or a bracelet.
Motorcycle helmets protect motorcyclists who crash from sustaining head injury and certainly death in most cases. The personal freedom issue must be balanced with the cost to society of the care of patients with catastrophic head injury. Riders cite the pleasure of going helmet-less, but often the cost of care for the injured motorcyclist is passed on to society at large.
definatly anything DEI (viper, python, hornet etc). best reliability. as stated above make sure your installer is good. the best alarm in the world is going to do much if its just hanging under the driver side dash.
alarm clocks last awhile on batteriesbut you could get an alarm clock that plugs into the wall or you could use a stereo.