This is a fully automated simulated alarm to prevent any intruders from entering your home.The alarm was activated at sunset and continued into the morning.Blinking light-emitting diodes (leds) are activated at sunset and remain "on" until morning.The blinking light emitting diodes (leds) and beeps on the device mimic the function of a complex alarm system.In addition, the circuit turns the lights on and off at regular 30-minute intervals throughout the night.It also has a call bell function.