4. Carved alloy Material Built Strong enough, exquisite craftsmanship, ingenious quality, simple aesthetic design, beautiful and generous. 3. Alarm prompts for abnormal situations, real-time defense, and protection of home safety at any time, allowing you to rest assured. 5. We have strict requirements for the production process, and all products have undergone quality testing before leaving the factory to ensure that they meet standards and can be used. The quality is up to standard. 1. Please select the specifications and colors according to the second image in the main image When the battery is running low, the system will display a message reminding you to replace the battery in good time., Manufacturer: YTBHSHXZ