Wireless Door/Window Entry Alarm

This compact wireless magnetic sensor kit alarms if a door or window is opened. The transmitter attaches to a frame and the magnet to the door; when separated, it triggers an 85dB alarm sound. It comes with a remote control to arm/disarm the system from indoors. Running on long-life batteries (~2 years standby), it’s suitable for Nigerian apartments and offices, providing an audible alert on unauthorized entry and offering a simple DIY security solution.