Installed in the peephole of the gate anti-theft door, it can be anti-theft, the surveillance person destroys the door lock and sticks a small advertisement, and the SD card saves the video recording for easy evidence collection. Wide-angle fisheye 1.6mm lens, the angle is about 180 degrees, and the door range is unobstructed. Support 128G memory card, support cloud storage, support protocol, can connect to NVR storage. Support motion detection alarm, built-in speaker and audio, can realize intercom. Pixels: 2 million (dpi). Horizontal definition: 2000 (TVL). Minimum Illumination: 1.0 (Lux). Lens: 1.6 (mm). Signal-to-noise ratio >: 48 (db). Power supply voltage: 5V power supply (V). Use environment: indoor door hole, villa door hole, industrial endoscope….. Effective distance: within 10 meters. Surveillance camera lens: 1.6. Lens focal length: 1.6. Immediately you paid for the order. Communication always is best way to solve problem. We accept any return in 30 days that we promise. Please never return the parcel without agreement. From us, it is no possible for us to get the parcel. We at strive to give all of our customers a 5 star service. As this helps us maintain a quality service. Communication is very important, we believe we can resolve all the problem with you. It’s our pleasure to answer any questions you have. (weekend and holidays excluded).