PROduct category 4×30AO · MAGNIFICATION: 4X· MATERIAL: AEROSPACE ALUMINUM· OBJECTIVE LENS DIAMETER: 30MM· TUBE DIAMETER: 30MM· ILLUMINATION: Red/ Green 5 levels· LIGHT TRANSMITTANCE (%): 98· PRODUCT WEIGHT (G): 305G· Length(MM): 165MM· Shockproof (G): 1500G· Waterproof : YES