Particular specification: Ball is made of 5mm-15mm alnico or stainless steel, firmly and airproof, the design fit for the following 4 proofs: Blast-proof Bullet-proof Damage-proof Water-proof (ip68, can dip to 10m under water) Optics window adopt 5mm bullet-proof steel glass, plane design, whole hog avoid the picture to distort, and protect the inner integrative vidicon; Adopt ip68 water-proof disign criterion, not only whole day working, but also dip into water. 360 degree level and plumb running; Other spec: 1 inner high definition and alterable focus integrative vidicon; 2 inner display temperature, temperature alarm; 3 show programme menu in screen, display the console lens