... intercom 4. e-lock unlock control 2.4GHZ wireless digital door viewer with doorbell, two way intercom, photo shooting function, e ... peephole camera Description:This is a 2.4GHZ wireless digital door viewer with doorbell, photo shooting function, e-lock unlock controller ... : 80cm.(3) Extended pole with diameter 35mm, extended pole with diameter 24mm, flexible PCB extended line, fixed pole A, B, C.( ...