1. Installed on the ceiling, residents cannot touch it. 2. Privacy protection: Based on laser depth imaging, it does not collect facial or other personal data, safeguarding the privacy of the elderly. 3. Unaffected by the environment and lighting conditions; can detect even in complete darkness. 4. Tracks resident movement, counts targets, and reports dangerous behaviors (such as climbing, falling, hanging, or prolonged staying), with a human recognition accuracy of no less than 99.5%. 5. A single device can cover an area of 860 square feet (80 square meters)