Answer:
The DS-KH2220-S distinguishes itself by featuring integrated image capture storage and snapshot playback directly on the indoor unit. Users can capture pictures during live view or calls and review stored images via a dedicated front-panel image key.
The primary differentiating feature of the Hikvision DS-KH2220-S is its onboard captured picture storage and playback capability. While standard analog four-wire stations only pass real-time analog video feeds to the display during an incoming call or manual live monitoring, the DS-KH2220-S includes internal storage functionality that allows users to record and store still images of visitors.
Operation is managed directly via dedicated physical buttons on the front panel, including a designated Image Key alongside standard Call Accept/Decline, Unlock, and Live View controls. Stored images can be browsed and reviewed on the 7-inch LCD screen without requiring external recording equipment.
