Features: - Built-in motion sensor triggers alarm, allowing you to be aware of intruders or visitors anywhere in your home at any time. - Three modes available: voice mode, music mode, and alarm mode, automatically playing pleasant songs or human voices to welcome your guests. - Volume adjustment: Four-level volume adjustment, simply press the button to adjust the volume. - 32 different ringtones to choose from, with a music selection button to switch between them. - Suitable for apartments, multi-story buildings, multi-family homes, shops, offices, factories, and other locations. Specifications: Condition: 100% Brand New Material: Plastic Power Supply: 9-12V Battery: 3 AAA batteries (not included) Detection Angle: Horizontal 110°, Vertical 60° Volume: 85dB Number of Ringtones: 32 Product Dimensions: Approx. 5 * 8 cm / 2.0 * 3.1 inches Package Weight: Approx. 107 grams Package List: 1 doorbell