The biggest draw back to the two way is how often the aaa battery fails. Seems every few months the pager beeps on it's own.
the 2way alarms/remotes have TWO of different communications modes.
Non-PAGE (1way) Mode (considered battery conservation mode)
&
PAGE (2way) Mode
Non-Pageing (or 1-way communications) mode is a simple
send command only,
w/OUT confirmation that the command was either recv'd or that the request
was executed/completed.
PAGE MODE (or 2-way communications) provides a higher level of
security...page mode is where the remote & truck alarm
periodically wake up and check that they are w/in range and
no faults have occured....this is a TRUE 2way communications
in PAGE mode the alarm sends back a confirmation...that the request
SENT (lock/unlock/start etc) was recv'd (alarm w/in range) and that
the request WAS (or was NOT) executed.
so in the NON-PAGE mode a command is sent
(and its HOPED that the command was accepted and performed)
PAGE MODE (on) method includes confirmation that the command was recv'd and
executed...if the action WAS NOT performe the remote will beep 3 times and the
remote display will NOT change.
Additionally if youre in NON-PAGE mode and the alarm goes off...your
remote will NOT notify you.
In PAGE mode (ON) if the alarm is tripped, the remote will beep, light up and/or
buzz (vibrate)
LCD displays consume more power than remotes that DONT have LCD displays...but
they also provide an visual confirmation/display
even MORE power would be consumed by a COLOR LCD display.
Personally i prefer PAGE mode & i go thru about 1 <aaa> battery
per month...
Viper - Security with Remote Start