1High Definition Recording: This 5MP lens delivers high definition, sharp videos and images, even in poorly lit environments. 2Fixed Focus Lens: The universal prime lens can objectively record and reflect the speed and rhythm changes of the subject, which is very suitable for monitoring babies, pets, etc. 3Fast and Secure Connection: The standard M12 thread ensures a quick and secure connection, significantly enhancing the device's reliability and performance. 4Easy Installation: The lens is designed for easy installation and disassembly, which doesn't compromise the installation and use of other accessories. 5Optical Parameters: The fisheye lens has 1.8mm focal length, F2.0 relative aperture, M12 x 0.5 interface, 180 field of view, 1/3 image size. 1 x1.8mm FisheyeLens