1. With a door phone peephole viewer, two-way talking. 2. Support take photos and video recording. 3. The camera and the screen built-in battery. 4. Support 64GB SD card (not included). 5. Support real-time clock display. 6. Support 9 languages UI, HD CMOS image sensor. 7. Support synchronous voice recording and video recording, screen system display function (GUI / OSD). 8. Support photo and video cycles covering function. 9. The host display connect the PC through USB to play music and video. 10. Offer you and your family a revolutionary security system to guard against unwanted visitors. 11. With a bright, full color LCD screen, you'll be able to see anyone at your door without them seeing you. 12. Door Peephole uses 4 x 1.5V AA batteries (not include) 13. Perfect for homes, apartments, dorms, businesses, or anywhere extra security is needed.