Specification BatteriesRequired : 1 Brand : Songzi Optics BulletPoint1 : 2.5X Loupes Field Of View: 150mm,Depth of field: 200mm,3X Loupes Field Of View: 140mm. Depth of field:200mm Working Distance R(300mm -500mm), L(450mm-650mm) BulletPoint2 : 3.5X Loupes Field Of View:130mm.Depth of field: 200mm ,Working Distance R(300mm -500mm), L(450mm-650mm) BulletPoint3 : Please choose working distance, then send message in the order, if you are siting while wearing loupes, we recommend Working Distance R(300mm -500mm), if you are standing while wearing loupes, we recommend Working Distance L(450mm-650mm) BulletPoint4 : Buyer can use PDCheck AR APP on phone, and save PD data screenshot, there are Far PD and Near PD. If you are a dentist, 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. If you are a surgeon, you can use the APP Near PD data directly. BulletPoint5 : If your Near Pupil distance is not included into loupes variations, please choose Other Near PD, and leave your Near interpupillary distance in the message and we will customize it according to your size. BulletPoint6 : Light Head Net weight:12g,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:5500k,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 : Magnification:3.5x ExternallyAssignedProductIdentifier : 8752103879060 ExternallyAssignedProductIdentifier1 : 0641835901805 ExternallyAssignedProductIdentifier2 : 641835901805 ItemName : 2.5X 3X 3.5X Songzi Optics Gray Titanium Frame TTL Dental Surgical Loupes with Led Headlight Customized Wide Field of View (Near Pd 58mm, Magnification:3.5X) ItemPackageDimensions_Height : 16 centimeters ItemPackageDimensions_Length : 23 centimeters ItemPackageDimensions_Width : 13 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : professional-dental-and-surgical-loupes MagnificationStrength : 3.5 multiplier_x Manufacturer : Songzi Optical Co.,Ltd Material : Aluminum MetalType : other ModelName : SZTTLGREY ModelNumber : SZTTLN253035 NumberOfItems : 1 PartNumber : SZTTLTTNEW 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.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 for the best possible vision through the lens. Warm Tipes: Buyer can use PDCheck AR APP on phone, and save PD data screenshot, there are Far PD and Near PD. If you are a dentist, 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. If you are a surgeon, you can use the APP Near PD data directly.If your Near Pupil distance is not included into loupes variations, please choose Other Near PD, and leave your Near interpupillary distance in the message and we will customize it according to your size. ProductSiteLaunchDate : 2012-10-07T07:00:00.000Z RequiredProductComplianceCertificate : CE Size : Near Pd 58mm SupplierDeclaredDgHzRegulation : not_applicable SupplierDeclaredHasProductIdentifierExemption : 1 UnitCount : 1 UnspscCode : 41111700