Specification BatteriesRequired : 1 Brand : Songzi Optics BulletPoint1 : 2.5X Loupes Field Of View: 150mm,Depth of field: 280mm, Working Distance 350mm -550mm,Weight: 40g. 3X Loupes Field Of View: 140mm. Depth of field:200mm ,Working Distance 350mm -550mm,Weight: 45g. BulletPoint2 : 3.5X Loupes Field Of View:130mm.Depth of field: 200mm,Working Distance 350mm -550mm,Weight: 50g. Loupes view declination angle made as about 40 degree. BulletPoint3 : Buyer can use PDCheck AR APP on phone, and save PD data screenshot, there are Far PD and Near PD. If you are sitting while working, you need to choose Far PD, but need to reduce 4mm, for example Far PD is 66mm, that mean dental working distance Near PD should be 62mm, then you need to choose 62mm Near PD variation when place order. BulletPoint4 : If your Near Pupil distance is not included into loupes variations, please choose Customized Near PD, and leave your Near interpupillary distance in the message and we will customize it according to your size. BulletPoint5 : 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, Color : Customized Near Pd ExternallyAssignedProductIdentifier1 : 0758358778040 ExternallyAssignedProductIdentifier2 : 758358778040 FdaDeviceClassification : i FdaIndicationOfUse : otc_and_rx FdaInstructionsForUseType : consumer FdaLabelType : consumer IncludedComponents : Case ItemName : 2.5X 3X 3.5X Songzi Optics Sliver Goggles TTL Dental Surgical Loupes with Led Light Customized Wide Field of View (Magnification:2.5X, Customized Near PD) ItemTypeKeyword : professional-dental-and-surgical-loupes MagnificationStrength : 2.5 multiplier_x Manufacturer : Songzi Optical Co.,Ltd Material : Aluminum ModelName : SZTTLSLIVER2 ModelNumber : SZTTLSLIVER2 NumberOfBoxes : 1 NumberOfItems : 1 PartNumber : SZTTLSLIVER2 ProductDescription : Songzi Optics SZTTL series has long working distance, Wide Field Of View,very comfortable to work with. LED illumination system are available.Multi-layer anti-reflection coating provides extremely high resolution.Anti-glare, scratch-resistance optic lens ensure long time no-trouble use. Helping to reduce eyestrain,By cringing your patients closer,You can improve your posture and avoid stooping. Multiple magnification levels loupes offer performance matched to your requirements.Multiple magnification levels enable you to see more,spot problem earlier and offer even higher levels of precision treatment. Exclusive Telescope Design with Precision Coated Optics.Custom Manufactured to Your Unique Measurements.Including angle of declination and working distance, providing you with the best visual and ergonomic system available. ProductSiteLaunchDate : 2012-10-07T14:00:00.000Z Size : Magnification:2.5X UnitCount : 1 UnspscCode : 41111700 WarrantyDescription : One year.