VERY easy to use - small, lightweight and accurate
Place the film in the slot to check density - no illuminator required.
Measuring Range:- 0.00 to 4.00 D
Accuracy:-  +/- 0.02 D or 1%
Repeatability:-  +/- 0.02 D
Warm up time:-  None
Power:- 9V Battery included - optional 9V AC Power Supply
Weight:- 5.9oz
Size:- 2.5" H x 1.5" W x 4.5" L

Warranty:- No hassle one year