digitharbor 3.5 inches TFT LCD screen digital door peephole viewer camera Night vision wide angle+Video Record+Photo shooting, 3.5" door viewer Doorbell Security Camera Cam 1.Power on/off: When pressing "doorbell key" or "power key" the indoor unit will power on and ring. Keep on pressing "power key" for 3 seconds, the device will be powered off. 2.Photo/video taking: Pressing "doorbell key", the device takes photo/video. In power on mode, pressing "power key" takes photo/video too. 3.Photo/video reviewing: In power on mode, pressing "review key" entre the file reviewing interface, the photos and videos are arranged in chronological order. Pressing "left key" or "right key" to select a document, then pressing "power key" to play it, pressing "power key" again the photo/video can be deleted. Pressing "review key" again to exit the reviewing interface. 4.Function setting: In power on mode, pressing "menu key" entre setting interface. Pressing "left key" or "right key" to select before or next item. Pressing "power key" to confirm and save it, pressing "menu key" again to exit setting interface. 5.Free Shipping with tracking id by USPS, 9~15 days delivery,sometime will delay 3~5 days. 1 year warranty ,please purchase with confidence.