Pair the Ubiquiti Networks UniFi Protect Wi-Fi Chime with your UniFi Protect G4 Doorbell Professional (available separately) via Wi-Fi to be alerted when someone rings the doorbell. The chime features an 80 dB speaker, a buzzer, and a built-in siren. Additionally, the chime will send notifications to the UniFi Protect app when the doorbell is pressed to ensure that you never miss a visitor.