【Intelligent Dual Mode】The door alarm supports two operating modes: Doorbell (ding-dong) and Alarm (alarm), adapting to different usage scenarios. Doorbell Mode: When the magnetic strip is pulled open, it emits a pleasant "ding-dong" sound and a red light flashes once. It's suitable for everyday situations such as doorbells and welcome reminders. Alarm Mode: When the magnetic strip is triggered, the red light flashes continuously and a high-decibel alarm sounds, effectively deterring intruders. It's suitable for security needs such as anti-theft and warehouse monitoring. 【3-Level Volume Adjustment】The door sensor alarm offers three adjustable volume settings: High (HI), Medium (MID), and Low (LO). The maximum volume exceeds 98dB (at 30 cm), providing strong sound penetration and remains clearly audible even in noisy streets or large commercial buildings. Low volume mode is ideal for nighttime use or quiet environments to minimize disturbance, while high volume mode is ideal for outdoor use or when a strong alert is needed. Switching between different settings allows for more precise and personalized alerts. 【Low-Power Design】The door alarms when opened adopts advanced energy-saving technology for open-triggered activation, with a standby current of less than 3 microamperes (μA). Powered by 2 AAA dry batteries, it offers excellent battery life. Whether used at a home entrance, welcoming customers at a store, or providing security in a warehouse, it provides long-lasting, stable operation without the need for frequent battery replacements, eliminating maintenance hassles. 【Easy Installation】Simply peel off the backing and stick the window alarms for security anywhere in your home, such as on doors, windows, cabinets, drawers, and gates. The magnetic strip has an induction distance of 2 cm, and closing the magnetic strip instantly silences the alarm, making operation simple and convenient. (Note: Please keep the installation area clean and align the arrows on the alarm and the magnetic strip within 2 cm.) 【36-Month Warranty】If you encounter any problems with the garage alarm, please feel free to contact our professional customer service team and enjoy the TECKNET 36-month warranty (registration required)., Manufacturer: TECKNET