Doorbird IP Door Station D21DKH

Active motion sensor with a detection angle of 54° (horizontal) and 70° (vertical), and a range of 1 to 10 m, configurable in 1 m increments depending on the environment. RFID: 125 KHz with a range of 0 to 3 cm, depending on the environment. Speaker and microphone with echo and noise suppression (AEC, ANR). Two-way, full-duplex audio streaming.