Incident light range 300 to 700 nm; uv component range 300 to 400 nm; c/o twin cds photocells; led lamps; control knob; uv absorbing filters; internal battery(mallory mercury type tr136; 12.000 cm; 6.500 cm w; 4.500 cm h; 1d.0 oz wt; 2.0 lb shpg wt; leather case w/shoulder strap