Feature:1. INTELLIGENT VISUAL PEEPHOLE: Come with 1080P HD imaging, front dynamic full control, more secure at anytime and anywhere, useful and practical2. RELIABLE MATERIAL: The door peephole viewer camera feature an oversized, super thick 304 stainless steel panel that can support up to 40mm gating3. SUPER NIGHT VIEWING TECHNOLOGY: Equipped with super non sensory night viewing function, two infrared lights can not be seen by your eye, will not disturb neighbors, automatically open at night4. 12 LANGUAGES: The digital gate viewer support 12 languages, English, Chinese, Russian, French, Italian, German, Japanese, Korean, Czech, Turkish, Arabic, Spanish5. BUILT IN LARGE CAPACITY LITHIUM BATTERY: Home video door is made of plastic and electronic materials, built in 1400mAh rechargeable polymer lithium battery, possess long battery lifeSpecification:Item Type: Door Peephole Viewer CameraScreen Size: 3.97in HD displayDoor Hole Installation Range: Approx. 15 ~ 35mm / 0.59 ~ 1.38inDoor Thickness Installation Range: Approx. 35 ~ 100mm / 1.38 ~ 3.94inSmall Memory Card(not included) Slot: Support up to 32GB memory expansionBattery Type: Built in 1400mAh lithium polymer batteryMaterial: Plastic, electronic, 304 stainless steel panel.Package List:1 x Indoor Main Host (viewer screen)1 x Outdoor Camera6 x Screws1 x Stainless Steel Mounting Plate1 x Charging Cable1 x User Manual