Hikvision video door phone ds-kis203
display parameters display screen: | 7-inch colorful tft lcd display resolution: | 800 × 480 operation method: | physical button audio parameters audio input: | built-in omnidirectional microphone audio output: | built-in loudspeaker audio compression rate: | 64 kbps audio quality: | noise suppression and echo cancellation device interfaces four-wire interface: | 4 four-wire interfaces (1-ch video input, 1-ch audio input/output, 1-ch power supply, 1-ch grounding in 1 four-wire interface) general power supply: | 12 vdc power consumption: | ≤5 w working temperature: | -10° c to + 55° c (14° f to 131° f)