Bresser 12x50 Monocular waterproof /bak-4 
KEY FEATURES
Magnification: 12 times
Coating: FMC green film
Optical system: roof type
Objective lens diameter: 50mm
Field of view: 87m/1000m
Prism material: BaK4
Whether it is waterproof: yes (nitrogen-filled waterproof)
Product size: 175x68x73mm
Product weight: 405g