got wireless motion sensors.

wiring involved for wireless alarm, is just the power lines for the control panel + external siren box.

so far battery life for each sensor i'm experiencing is approx 1.5-2 years with indicator.

yea depends on what battery used.

i use CR123....cost about RM8-10 depends on brand. and change is needed after approx 2 years.

good thing about wireless is that its transferable and easily customizable (incase u wanna reno in the future).

alot of pros and cons la. so it depends on your preference haha