WESTINGAREA supplied L700682 Refractometer have the excellent performance displayed as:

Auto Chart Projector is a precision optical instrument for accurate
refraction. It provides 30 different charts and 35 masks, with programmable
remote control. Duochrome test charts to check single and binocular vision,
and polarized test charts to check binocular vision and ocular muscle imbalance.

* Specification:

Projection distance:1.5m~6m
Projection magnification:30x(at 5m)
Chart:30 different pattern
Speed of chart conversion:one chart per 0.03g
Mask:1 open, 5 horizontal lines,8 vertical lines,
21 single letters, 1 red/green
Speed of mask conversion:One mask per 0.03s
Program:2 sets programs, each program contains
up to 30 steps
Light source:12V,50W Halogen Lamp
Auto-off funtion:After 10 minutes idle time
Power source:AC 220V,50Hz or 110V,60Hz
Power consumption:80W
Dimensions:300mm(L) x 230mm(W) x 240mm(H)
Net weight:6Kg
Accessories:Remote control, Polarized metal
screen, halogen lamp, polarized glasses,
fuses(2), batteries(2)
Optional accessories:Floor stand,wall stand

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for more information,please mail to: harmony_li@ehsy.com