1、Intelligent Detection: Instantly know when someone is at your door with this smart doorbell. It uses infrared sensor technology to detect motion up to 6‑8 meters away, ensuring you never miss a visitor. 2、Convenient Remote Control: With the included remote control, you can easily adjust the settings of the doorbell from a distance of up to 8 meters. It also allows you to disable the motion detection when needed. 3、Multi Functional: The doorbell comes with 3 modes, welcome mode, alarm mode, and smart mode. It also boasts 4 volume levels (25dB‑110dB), making it suitable for all your needs. It even includes a low battery reminder to alert you to replace the battery. 4、Customizable Sound Selection: Whether you are using the welcome mode or the smart mode, you can choose your desired sound from the 24 available options. This customization makes your greeting more personalized and welcoming. 5、Versatile Power Options: The doorbell can be powered by 3 AAA batteries (not included), or you can use a USB cable to charge it (USB cable not included). Choose the option that works best for you. 6、Wide Application: This infrared sensor doorbell is not only suitable for front doors, but also for back doors, garages, and other entryways. It provides a convenient and secure way to monitor your home.