Merytes 10X50 396FT/1000YDS Sports Military Optics Binoculars Telescope Spotting Scope with Compass for Hunting Camping Hiking Traveling Concert Waterproof Shockproof 1.Highly sealed and with the waterproof and seismic standards, overcome the harsh outdoor sailing environment;Dense metal lens barrel, strong and durable 2.Can withstand the strong impact resistance of 20 g, and can defense the violent shock of 5-55-5 HZ; BAK4 prism material, multi-player FMC coating, large eyepiece, long exit pupils, clear and sharp videos. 3. precise navigation compass. Not be afraid of the giant heavy waves and the squally showers. Meirui tesla navigation series binoculars help you brave the wind and waves, and it has reached the troops standards immersion waterproof technology, and can make you remarkable. 4.And have the functions of the large, superior and tall night vision capabilities; Binocular focus, the tactical range points reticle is built-in, then stable inverted suspended prism system, is in line with the MIL-STD-810 standard. And it has reached the current highest waterproof level of IPX5, 5. precise navigation compass. Not be afraid of the giant heavy waves and the squally showers. Meirui tesla navigation series binoculars help you brave the wind and waves, and it has reached the troops standards immersion waterproof technology, and can make you remarkable.Please refer to the manual and the buyer for all the use of the problem.