Specification BatteriesRequired : 1 Brand : Songzi Optics BulletPoint1 : 2.5X loupes Field Of View: 100-110mm,Viewing Angle: 20-150°,Depth of field: 100mm ,Weight: 65g. 3X loupes:Field Of View: 75-85mm. Viewing Angle: 20-150°,Depth of field:90mm ,Weight: 65g BulletPoint2 : 3.5X loupes:Field Of View:60-65mm. Viewing Angle: 20-150°.Depth of field: 60mm BulletPoint3 : 4 kinds of working distance : S(280 - 380 mm), R(360 - 460 mm), L(440 - 540 mm), XL(500 - 600 mm).How To Choose Your Loupes Determine your working distance, which will also automatically determine your field of view. While working on a friend or family member have someone measure the distance from your eyes to your friend's mouth or body: this is you working distance. BulletPoint4 : Choose the distance that is closest to the selection we offer.If you are sitting while working, your height is from 160cm to180cm, we recommend working distance R (360-460mm ). IF you are standing while working, your height is from 170cm to 180cm, we recommend L (440-540mm) working distance, even XL(500-600mm) working distance will be suitable. BulletPoint5 : LED headlight High intensity:15000-30000Lux, Continuous run-time:4 hours,Battery pack weight:100g, LED bulb:1 W,Charge voltage:AC110V/240V/50-60Hz BulletPoint6 : Do not look directly into the sun when you wearing the loupe. BulletPoint7 : Keep the device dry, do not use it at any wet place. BulletPoint8 : Not attach or wipe the optic glass with anything hard or dirty. BulletPoint9 : Put the device into the box after using. Color : Near Pd 60mm ExternallyAssignedProductIdentifier1 : 758358778248 ExternallyAssignedProductIdentifier2 : 0758358778248 GpsrSafetyAttestation : 1 ItemName : 2.5X 3X 3.5X Songzi Optics Black Goggles TTL Dental Surgical Loupes with Led Light Customized Wide Field of View (Magnification:3X, Near PD 60mm) ItemPackageDimensions_Height : 6.63 inches ItemPackageDimensions_Length : 10.92 inches ItemPackageDimensions_Width : 9.72 inches ItemPackageQuantity : 1 ItemTypeKeyword : professional-dental-and-surgical-loupes MagnificationStrength : 2.5 multiplier_x Manufacturer : Songzi Optical Co., Ltd Material : Aluminum ModelName : 4.0X Ergo Loupe surgical binocular loupe ModelNumber : REEHUT-DY-119 NumberOfItems : 1 PartNumber : SZTTL&SZ06C ProductDescription : This model loupes can only be used by person with normal vision. If you are a beginner to use loupes, we recommend you to choose magnification 2.5X, because lower magnification loupes have bigger field of view, so loupes focus easy. The pupillary distance can be adjusted by one center axis,it is very simple and convenient for user. This kind of loupes is widely used for many microsurgery,operations of dentistry,nerve and heart disease etc...and also the loupe is widely used for the eletronical industry,precise manufacture,textile facture and researcher or engineer who require the precise observation in Optical Magnification. loupes have 4 kinds of working distance : S(280 - 380 mm), R(360 - 460 mm), L(440 - 540 mm), XL(500 - 600 mm). How To Choose Your Loupes Determine your working distance, which will also automatically determine your field of view. While working on a friend or family member have someone measure the distance from your eyes to your friend's mouth or body: this is you working distance. Choose the distance that is closest to the selection we offer.If you are sitting while working, your height is from 160cm to180cm, we recommend working distance R (360-460mm ). IF you are standing while working, your height is from 170cm to 180cm, we recommend L (440-540mm) working distance, even XL(500-600mm) working distance will be suitable. ProductSiteLaunchDate : 2014-06-28T14:00:00.000Z Size : Magnification:3X Style : DY-102 3.5X SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnitCount : 1 UnspscCode : 41111700