Doorbird D21DKV, IP VIDEO DOOR STATION, RAL 5012, stainless steel, powder-coated, semi-gloss, Part# 423888173 awls It also has a continuously

It also has a continuously variable ducking control that will enable attenuation of the input signal from a minimum of 10 dB to a maximum of 48 dB relative to the normal unmuted condition and a gradual fade back from mute when the mute or gate control is deactivated

Output level 103 db/1meter

39 long x 2

Thermo Plastic Rubber

Speaker and mic for communication

Doorbird D21DKV, IP VIDEO DOOR STATION, RAL 5012, stainless steel, powder-coated, semi-gloss, Part# 423888173 awls It also has a continuouslyThe high performance Doorbird D21DKV 423888173, IP VIDEO DOOR STATION, RAL 5012, stainless steel, powder coated, semi gloss is for multi tenant residences and buildings with up to 500 units. Features: Surface and flush mount possible, housings sold separately LAN connection (PoE capable) 2 way audio Ultra wide angle lens, 720p, night vision, 12 IR LEDs 4D motion sensor, RFID reader Keypad, display module 2 freely configurable bistable switching relays