Hikvision DS-KB2421-IM for analog video door phones description

• Video Parameters

• Camera1/4″ CMOS
• Resolution720 × 576
• Video Frame RatePAL: 25 fps

• 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 Audio,Input/Output, 1-ch Power Supply, 1-ch Grounding)
• I/O Output1 Relay Output

• General

• Brand: Hikvision
• Power Supply12 VDC
• Power ConsumptionMax. 5W
• Working Temperature’-10° C to + 55° C (14° F to 131° F)
• Working Humidity10% to 90%
• Dimensions (L X W X H)145 mm × 49.2 mm × 26.45 mm (5.7″ × 1.9″ × 1.0″)
• MaterialZinc Alloy