digital peephole viewer 3.5 inch color screen Fits any door 35-65mm,60-90mm thickness with door bell DIY,CE,ROHS,FCC approve 3.5inch screen highly clear image peephole viewer Operation: 3.5” color TFT displayPeephole barrel :12mm (large peephole barrel can be done) .Fits any door 35-65mmSensor :300,000pixelsPress call button , red led light turn on ,door chime ring at indoor display .Press ...