Specification AspectRatio : 16:9 Brand : Huanyu BulletPoint1 : Compared with the traditional LCD eye chart, this eye chart adds a contrast sensitivity test and amblyopia optotypes. BulletPoint2 : Convenient for test: With the maximum 3 lines and 8 rows of optotypes showing on screen. BulletPoint3 : Display Fuctions: ☑Line display ☑List display ☑Signal display ☑Red & green color display ☑Full screen display BulletPoint4 : Accurate and exact: effective distance is 2-8m, can be adjust to the minimum distance(lm) for crowded area. BulletPoint5 : Numerous Option of Optotypes: international C optotypes, E optotypes, letter optotypes, children optotypes, numeric optotypes, astigmatic optotypes, cross optotypes, binocular balance optotypes, color blindness optotypes, and so on Color : VC-4 19" ItemName : Huanyu 21.5 inch LCD Eye Test Chart Projector 21.5" (54.6CM) LED Visual Acuity Panel Chart Monitor Vision Tester Optometry Equipment AC100-240V (VC-4 19") ItemPackageQuantity : 1 ItemTypeKeyword : therapeutic-eye-charts Manufacturer : Huanyu NumberOfItems : 1 PartNumber : WJJ-283D ProductDescription : Technical data: Max. Screen Resolution: 1680×1050@60HZ Screen Dot Pitch: 0.282mm Screen Type: TFT Screen Ratio: 16:9 Screen Dimension: 21.5inch(54.6cm) Visible Size:473.76mmx296.1mm Visible Angle: H:170/V:160 Color: 16.7m Max. Brightness: 300cd/m2 Max. Contrast Ratio: 2000:1 Signal Response Time: 5ms Measuring Distance: 2~8m (adjustable) Record of Vision Test Method: Imperial fraction, or decimal Rmote-controlling Distance: Maximum. remote-controlling distance>8m Power Source: AC100-240V + 10%, 50/60Hz Standard Power Consumption: 60W Standby Power Consumption:<2W
Service condition: Working tempetature: 5℃--35℃ Working humidity: 20%RH-80% Atmospheric pressure: 86kpa--106kpa