This solar alarm is designed as a warning system when an intruder approaches your immediate vicinity. It will set off an audible sound so that you will be warned of any possible parameter breach.
The unit has two modes i.e. day mode and night mode. This can be set at the users discretion.
Best part about this alarm system is that it is solar powered. So no fussing about batteries or wires, place it anywhere you want with simple installation.