Feature:1. Compatibility with Smart Home Systems: The doorbell is compatible with existing smart home systems, providing a convenient way to manage visitors at your doorstep. Easily integrate it into your smart home setup.2. Separate Design: Wireless Doorbell features a separate design, making it easy to install and maintain. It is suitable for various doorways and portals.3. Highly Sensitive Sensor: The doorbell is equipped with a highly sensitive sensor, ensuring accurate detection of visitor movements. This allows for timely notification when someone approaches your door.4. Stable Wireless Connection: Sensor doorbell operates on a wireless connection, providing a stable and reliable signal. It has a wide coverage range, ensuring that you receive notifications.5. Multiple Music Options: With a selection of various music options, the wireless sensor Doorbell allows you to personalize the sound of your doorbell. Choose a tune that suits your style and preferences.Specification:Item Type: Sensor DoorbellMaterial: ABSTransmitter: Battery Type: Lithium Battery Battery Model: AAA batteries x3Ships without battery.Package List:1 x Transmitter1 x Receiver1 x Connector1 x Base2 x Screws2 x Expansion Screws1 x English Instruction Manual