Broad applicability: Prevent energy waste and safety risks with intelligent reminders. Versatile for air conditioners, safes, refrigerators, and security doors to help ensure efficient use and reliable monitoring. Smart detection system: Uses intelligent detection and accurate integrated sensors. Alerts via voice notifications when doors or windows are left open, helping maintain a safe living environment without disruption. Quick installation: Easy setup with multiple installation options. User friendly design requires no technical knowledge, and the adjustable alarm volume accommodates different needs for freezer door alerts. Energy-saving solution: An affordable choice for eco-conscious users. The energy-efficient alarm design minimizes power consumption during everyday use. Use scenarios: - At home when you leave for work, the system notifies you if a door or window is left ajar, reducing risk and wasted energy. - In kitchens or cold storage, it helps prevent energy loss by signaling if the refrigerator or freezer door is not fully closed. - For safes or security doors, it provides timely alerts to ensure valuables remain protected without constant monitoring. Key attributes: function and compatibility with common household appliances (air conditioners, safes, refrigerators, security doors); easy installation; adjustable alarm volume; low power consumption; clear voice alerts.