Analog Four Wire Door Station – DS-KB2411 Specifications GENERAL Power Supply12 VDC Power ConsumptionMax. 3W Working Temperature’-10° C to 55° C (14° F to 131° F) Working Humidity10% to 90% Dimensions (L X W X H)195.8 mm × 132.8 mm × 18.39 mm (7.7″ × 5.2″ ×0.7″) MaterialAluminum Alloy DEVICE INTERFACES Four-Wire Interface1 Four-Wire Interface (1-ch Video Input 1-ch Audio Input/Output 1-ch PowerSupply 1-ch Grounding) I/O Output1 Relay Output AUDIO PARAMETERS Audio InputBuilt-in Omnidirectional Microphone Audio OutputBuilt-in Loudspeaker Audio QualityNoise Suppression and Echo Cancellation DEVICE INTERFACES Four-Wire Interface1 Four-Wire Interface (1-ch Video Input 1-ch AudioInput/Output 1-ch Power Supply 1-ch Grounding) I/O Output1 Relay Output LIGHT SUPPLEMENT Light Supplement ModePhotosensitive IR Supplement IR Range: 2 Meters VIDEO PARAMETERS Camera1/4″ CMOS Resolution720 × 576 Video Frame RatePAL: 25 fps Also check Hikvision DS-KB8113-IME1 Video Doorbel Value Series Network Wire Card Terminal DS-K1T802E HIKVISION INTERCOM KIT 4 WIRE DS-KIS203