... . 2.8 inch LCD screen 4. CE Certificated 5. digital door viewer The peephole viewer (BR-600) adopt high technology, 2.5 inch ... view angle6. Barrel : 12mm and 14mm7. Door thickness : 35mm to 57mm8. Accessories : peephole viewer, base flange, peephole, tightening tool, manual and warranty card ... the screen7. Tighten the locking screw and finish installation Doorbell/door peephole cam/digital hidden cam