Test Tubes: 75 x 12 mm with 10 mm path length and 1 ml min. Vol
Regulation: 190 to 250 VAC
Current: 15 ma @ 220 VAC (typical
Display: LED 14 mm 3 digits for the main display and 2 digits for filter
Features: Light Source - LED Cluster Nine Filters - 410, 430, 470, 490, 520, 540, 580, 610, 640. Adjust of 0.00 OD Reading by Auto ‘ZERO’. Durable Performance with Low Energy Consumption. LED Cluster based Filter Selection Technology. Long Life of LED Cluster.