"110/220 VOLT; 50/60 HZ; STIMULUS INTENSITY RANGE EQUAL TO OR GREATER THAN 0.08 TO 10,000 ASB; 33 CM BOWL RADIUS W/BOWL ILLUMINATION OF 31.5 ASB; CUSTOM DESIGN ALSO STORES COLOR PATTERNS; VERTICALLY ADJUSTABLE; STATISTICAL SOFTWARE PKG FOR COMPARING 10 PREVIOUS EXAMS AND CALCULATES SIGNIFICANT CHANGES; 14 CUBIC FT VOLUME,UNDER 150 LB; USED FOR PERFORMING TEST FOR GLAUCOMA SCREENING,CENTRAL 30 SCREENING,PERIPHERAL SCREENING,CENTRAL THRESHOLD AND NEUROLOGICAL THRESHOLD"