"DR 900; HAND-HELD; ALLOWS QUICK ACCESS TO FREQUENTLY USED TESTING METHODS; WATERPROOF; DUSTPROOF AND FIELD DURABLE; INTUITIVE USER INTERFACE; EASY DATA TRANSFER CAPABILITIES; ABLE TO TEST UP TO 90 OF THE MOST COMMONLY TESTED WATER METHODS; 160 X 240 PIXEL BACKLIT GRAPHICAL DISPLAY; DETECTOR: SILICON PHOTODIODE; USB TYPE MINI IP67 INTERFACE; SOURCE LAMP: LIGHT EMITTING DIODE (LED); INCLUDES: COLORIMETER, TWO 1-INCH GLASS SAMPLE CELLS, TWO 1 CM PLASTIC SAMPLE CELLS, 1 X 16 MM COD/TEST N TUBE ADAPTER, 4 AA ALKALINE BATTERIES, PRINTED MANUAL, INSTRUMENT AND PROCEDURE MANUALS ON CD, USB MINI TO USB CABLE"