The Ezviz CS-HP4 Wireless Smart Video Doorphone has the following specs: 1080p resolution, 155° ultra-wide viewing angle, 4.3-inch color screen, night vision up to 3 meters, built-in microphone and speaker, 4600mAh rechargeable battery, MicroSD card storage up to 512GB, Wi-Fi connectivity, and supports the EZVIZ app for live viewing and two-way audio communication; it is essentially a wire-free peephole doorbell with a dedicated screen for viewing at the door.