Updated June 26, 2025 I haven't confirmed the operation because my home Wi-Fi is unstable. If it doesn't work, I will accept returns. It runs on three AAA batteries. Double-sided tape for wall mounting is included. It detects the passage of people and pets and sends notifications to your smartphone. The free "Smart Life" or "Tuya" app is required. If you have a Wi-Fi environment, you don't need a separate hub. Please research the setup method yourself. I will answer questions to the best of my ability. An English instruction manual is included. It achieves a smart home as an alternative to SwitchBot, Tapo, etc.