Manuals (For systems with software version 1.04 or later) Description Size    Language      Chapter A 2546 kB Chapter B 1275 kB Chapter C 5059 kB Chapter D,E,F 716 kB   BTA manuals Description Size    Language     D90 BTA 280 kB D150 BTA digital 360 kB D160 BTA digital 5050 kB   D550 Extreme manual Description Size    Language      D550 Extreme 4150 kB