Dulcii Smart Remote Control Home Office Store Magnetic Sensor Alarm (3 Sensors + 1 Controller) Compact size and easy application Low power consumption and long work time 4 buttons: Alarm button, disarm button, emergent alarm button, doorbell button/learning code button The remote control can control 3 alarm sensors at the same time, which adds more security to daily life Can be installed to doors and windows to prevent burglary via sending off alarm