WH0991 прибор для проверки зрения с таблицей чтения

Product Overview

Description

 

Near vision tester 

 

Model :WH0991

 

 Reading charts 

Double side , another side is amsler grid.

You may change another side other pictures as per you need.

 

PACKING LIST.

One near vision tester.

One lithium battery

one USB cable

one power adapter (charger)

One stand

One pointer

 

Power supply

Lithium battery:3.7V

Battery charger(power adapter) input:AC 100-240V, 50-60Hz , OUTPUT :dc 5v ,1.2A

 cHARGING TIME:5 hours

The device can be powered by the computer with the USB cable

 

Near vision tester measurement:\\

1.put the vpal on the stand, adjust the gradient ,

2.tURN ON THE DEVICE

3.USE THE CORD TO DETERMINE THE TEST DISTANCE OF 40CM FROM THE EYE.

 

cONCERNS:

1.wHEN NOT IN USE , PLEASE POWER OFF THE DEVICE .

2.Keep the surface of the Vpal clean

3.USE A SOFT AND DRY CLOTH FOR CLEANING.

 

tECHNICAL SPECIFICATIONS

1.TEST DISTANCE :35CM

2.LENGTH OF THE CORD:35CM

3.DIMENSIONS:185*115*11MM

 Near vision tester

LED Blacklight vision testing(patent product)
Standardized and uniform illumination
Clearly printed optotypes

 

Chart select:Tumling E,Landolt ring, letter,number and graph.
Test distance:25cm,30cm,35.6cm,40cm
Power supply:Four AAA batteries, or AC Power(100-240v),or Computer(by USB CABLE)
Dimensions:19.6cm*14.5cm*1.0cm

 

TEST DISTANCE	35CM
LENGTH OF THE CORD	35CM
DIMENSIONS	185*115*11MM
LIGHT	LED Blacklight vision testing
Battery charger	Input:AC 100-240V, 50-60Hz , OUTPUT :dc 5v ,1.2A