Specification Brand : Songzi Optics BulletPoint1 : Magnification:5X , Field Of View: 60mm,Certificate: ISO9001:2008,CE.Viewing Angle: 20-150°.Magnification:6X , optical system: prism optics,Field Of View: 55mm. BulletPoint2 : Model Number:SZ08B, Light Head Net weight:8g,Light head housing material Special Aluminum,Light head size Diameter 20mm, length 35 mm.Highest illumination intensity 10,000-60,000Lux full variable intensity control, Color Temperature:6000k,advanced rechargeable polymer Li-Ion cells,LED can be used while charging.Light source 3W Light Emitting Diode (LED) ,Lamp Life:100000h,Adapter Input: 100-240VAC/50-60Hz, output: 5V.Battery run-time:4 hours, battery:1 piece, BulletPoint3 : 4 kinds of working distance : S(340mm) ,R(420mm) ,L(500mm) ,XL(550mm) BulletPoint4 : 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 patient's : this is you working distance. Choose the distance that is closest to the selection we offer. BulletPoint5 : IF you are a dentist , your height is in the range from 160cm to 180CM,we recommend R(420mm) working distance.IF you're a surgeon, you are sitting while working, your height is from 160cm to180cm, we recommend working distance R (420mm ). IF you are standing while working, your height is from 170cm to 180cm, we recommend L (500mm) working distance, even XL(550mm) working distance will be OK. Color : Magnification:6x ItemName : Songzi Optics 5X 6X Optional Binocular Medical Surgical Dental Loupes with Led Headlight for Dentistry Surgery Others (Working Distance: S (340mm), Magnification:6X) ItemPackageQuantity : 1 ItemTypeKeyword : professional-dental-and-surgical-loupes MagnificationStrength : 6 multiplier_x Manufacturer : Songzi Optical Co.,Ltd ModelName : Dental Occlusal ModelNumber : LV-343J-ETI0 NumberOfItems : 1 PartNumber : LV-343J-ETI0 ProductDescription : The pupillary distance can be adjusted by one center axis,it is very simple and convenient for user. 4 kinds of working distance : S(340mm) ,R(420mm) ,L(500mm) ,XL(550mm) . Please choose your working distance when you will purchase ours loupes. Each Loupe Set is complete with headlamp clip, locking lanyard, microfiber lens cleaning cloth, screwdriver and padded case. ProductSiteLaunchDate : 2012-10-07T21:00:00.000Z RequiredProductComplianceCertificate : No Size : working distance: S (340mm) SupplierDeclaredDgHzRegulation : not_applicable UnspscCode : 41111700