Sometimes toys can work almost as good as the real thing. Take this Key Card Alarm w/ Time Stamp Set. It comes with two identical key cards (to circumvent the alarm or view the time stamps), a digital time readout (in 24 hour format), an alarm unit and a sensor (can be up to .25" apart), and all the installation hardware you need (i.e. hook and loop tape). The Key Card Alarm stores time stamps of the last four times security was breached. Like professional alarms, if the two pieces are separated, an annoying klaxon will sound. But this alarm has a stealth mode: you can silence the alarm and just collect the time stamp.