"PWR SUPPLY REQ 115V AND 230V AC; 50 HZ AND 60 HZ; PWR CABLE MIN 5 FT LG; BATTERY OPERATION CAPABILITY; DIM. SPECS 20.000 IN LG ( EXTERIOR HANDLES AND WIRE STAND EXCLUDED; 9.000 OR 12.000 IN. H; 9.000 OR 12.000 IN W; STORAGEALUMINUM,MIN. 14 GAUGE; FREQ RANGE 100 HZ TO 2.5 MHZ; CRT 3 IN. H,BY 4 IN.W; SURFACE PROBES 6; BOLT HOLE PROBES 2; TEST BLOCKS 2"