Almost new indoor surveillance cameras Potential Technical Specifications Image Resolution: Available in resolutions starting from 2 megapixels (1080p) up to 8 megapixels (4K UHD) to provide high-definition details. Lens: Often comes with a fixed aperture (e.g., 2.8mm for a wide viewing angle or 3.6mm) to achieve a field of view of approximately 102 degrees. Night Vision: Supports advanced technologies like EXIR 2.0 infrared with a range of up to 20-30 meters, and some models support ColorVu technology for color imaging in complete darkness. Audio: Many of these versions are equipped with a built-in microphone for audio transmission via coaxial cable or network. Additional Features AI Technologies: Some models support AcuSense technology to distinguish between human and vehicle movement and reduce false alarms. External Casing: Often available with a plastic or metal casing depending on the classification (indoor or outdoor), with weather resistance in outdoor models. Angle Adjustment: The three-axis adjustment feature (Pan, Tilt, Rotate) allows for adjusting the optimal viewing angle after installation. Serious buyers only Non-negotiable