Hikvision DS-KB8113-IME1(B) 2MP POE Vandal-Resistant Doorbell IP Video Intercom
Vandal-Resistant Doorbell. IEEE802.3af, standard PoE or. Audio Compression Standard G.711 U，G.711 A. Audio Input Built-in omnidirectional microphone. Audio Output Built-in loudspeaker (More than 80 dB within 30 cm).