4-MP 1/2.7" CMOS image sensor, low luminance, and high definitionimage. Outputs max. 4 MP (2688 ×1520)@20 fps, and supports 3.6 MP(2560 × 1440) @25/30 fps . H.265 codec, high compression rate, ultra-low bit rate. WDR, 3D NR, HLC, BLC, digital watermarking, applicable to variousmonitoring scenes. ROI, SMART H.264+/H.265+, flexible coding, applicable to variousbandwidth and storage environments. Alarm: 2 in, 1 out; audio: 1 in, 1 out; supports max. 256 G Micro SDcard; built-in Mic. 12 VDC/PoE power supply, easy for installation. EmpireTech Special Series 4MP 2.8mm Fixed-Focal Lens IP Camera PoE Mini Camera Built in MIC,Video Tampering, Audio Detection, IPC-HUM4431S1-L4