High-quality imaging: 1/3″ Progressive Scan CMOS Image Sensor ,high quality imaging with 4MP resolution(2688 1520). Clear imaging against strong backlight due to 120 dB WDR technology, provide a more HD and smoother visual experience; H.265+ compression technology: Smart H.265 technology reduces bit rate and storage requirements by up to 80% when compared to standard H.264 video compression. Support network storage NAS (NFS, SMB/CIFS), auto network replenishment (ANR) etc,built-in memory card slot, support microSD card, up to 256 GB; AcuSense Function and Resistant: Focus on human and vehicle targets classification based on deep learning and (-S function) audio and alarm interface available. Water and dust resistant IP67 and vandal resistant IK08,it can be used in corridors, elevators, office ,indoors and other spaces; About camera version: This is the original English Version. We are important partner of Hik/vision, this surveillance camera was made by Hik/vision. Our price is competitive with the US Version. And support unlimited upgrades,you can also contact the seller to get the firmware; Reliable top quality and service: In order to improve our customer experience, we provide lifetime support from becamio. Please understand our products and the after-sale before purchase. If you have any questions, please feel free to contact us. Hoping our camera can provide a safe environment for your life and work. Thanks a lot.