Dual-mode connectivity for faster, more stable network access - WiFi + Bluetooth enabled: dual-mode connection provides reliable networking. The system is designed to be faster and more stable, with a claimed speed up to 3 times faster than WiFi alone. Effective deterrent with audible and visual alerts - 80 dB sound alarm plus red indicator light to deter intruders and notify you promptly. Four flexible alarm modes - Choose from four options: alarm sound with light, alarm sound without light, no alarm sound without light, and alarm sound with light. A variety of settings to suit different scenes and times. Customizable alarm duration - Set alarm duration manually from 5 seconds to 180 seconds. Convenient app-based remote control - Tuya app enables one-button activation and deactivation from anywhere at any time for easy remote control. Voice control and status checks - Voice-controlled operation and the ability to check whether doors and windows are open or closed. Sharing and family access - Share control with family members to monitor and manage together. Offline monitoring and alerts - If the device goes offline, the app will indicate offline status after 30 minutes. Low battery guidance - Uses 2 AAA batteries (not included). When battery is low, your phone will notify you to replace them. Practical use scenarios - Home security while away: arm the device with sound and light via the Tuya app, monitor door/window status remotely, and receive alerts if an intrusion is detected. - Family sharing: multiple household members can control and monitor the device, ensuring coordinated security coverage. - Quiet monitoring in specific scenes: select the no-sound/no-light mode for discreet monitoring in sensitive areas while still receiving app alerts if needed.