Objective Lens Diameter: 40 Brand Name: NoEnName_Null Magnification: 40 Eyepiece diameter: 22 Prism Description: BAK4 Water Resistance Level: IPX6 Origin: Mainland China Field of View: 4.4 Type: Monocular Lens Coating Description: FMC Focus Type: DETACHED Item model number: 8-40x40 Model Number: 8-40x40 Material: Plastic High-concerned chemical: none Laser Function: No