Humanized design, simple installation—no professional installation required. Ready to use out of the box. Infrared sensing works day and night. Multiple voice options available in normal mode, including welcoming messages in various languages. Recording mode: Record custom audio via microphone or playback. Volume adjustable across three levels—customizable to suit your environment. High-sensitivity infrared sensor with detection range of 2–7 meters; adjustable sensing distance. Mounting bracket allows 360° rotation with no blind spots. Functions: 1. Normal mode: Press the song selection button briefly to play one of 20 preloaded sounds. 2. Recording mode: Press and hold the record button until you hear a “beep” to begin recording. Release the button to end recording; two beeps will confirm completion. 3. Press the record button briefly to enter recording mode. When the infrared sensor is triggered, the recorded message plays. Each new recording overwrites the previous one. 4. Power/Volume button: Controls power (press and hold for 3 seconds to turn on/off) and volume (three levels: high, medium, low). Volume level prompts are provided. Device powers on by default when connected to power. Color: Black Material: Plastic Package Includes: 1 x Smart Welcome Doorbell Note: Color may vary slightly due to lighting conditions and screen settings. Measurement tolerance: ±1–3 cm.