UN0516 fixed focus lens features ultra-large F1.1 aperture, with night vision clarity comparable to daytime and excellent detail capture. Equipped with 1/2.8" sensor and 3.5mm focal length, it provides 115° diagonal wide-angle field of view, covering wider areas with fewer blind spots. With day-night co-axial technology, it maintains clear and sharp focus all day without repeated focus adjustment. Even in low-light environments, the lens maintains high brightness and low noise, making it the ideal choice for 24/7 monitoring applications such as home security and intelligent surveillance, providing reliable protection anytime, anywhere.