High Efficient encoding technology greatly saves bandwidth resource and storage space. Better encoding algorithm to save more bandwidth and storage.In dim condition, specially at night, there is snow like noise in the picture,but with the 3D DNR, it can suppress snow-like noise and keep details, offer you a good surveillance imageThe camera passes a series of strict test on dust and soak. It has dust-proof function, and the enclosure can works normal after soaking in 1 m deep water for 30 minutes.