"COUNTS PARTICLES FROM SIZES 0.3, 0.5, 1.0, 2.0 OR 5.0 MICRONS; 6V NI-MH SELF-CONTAINED BATTERY PACK, 8 HRS. OF TYPICAL INTERMITTENT OPERATION; AC TO DC MODULE, 100-240VAC TO 9VDC AT 350MA TYPICAL; RS-232 INTERFACE; 16 CHARACTER LCD DISPLAY; 2-BUTTON MEMBRANE KEYBOARD; OPERATING TEMPERATURE 0 TO 50 DEG C; LASER DIODE LIGHT SOURCE, 30MW, 780NM"