Brother Copier/Printer MFC-9970CDW - Manual (Page 194)

178
Noise level Sound power
Operating
(Colour Printing):
L WA d = 6.94 B (A)
Operating
(Monochrome Printing): L WA d = 6.88 B (A)
Ready: L WA d = 4.8 B (A)
Sound pressure
Operating (Printing):
L PA m = 57 dB (A)
Ready: L PA m = 33 dB (A)
Temperature Operating: 50 °F to 90.5 °F (10 to 32.5 °C)
Storage: 32 °F to 104 °F (0 to 40 °C)
Humidity Operating: 20 to 80% (without condensation)
Storage: 10 to 90% (without condensation)
ADF (automatic document
feeder)
Up to 50 pages (Staggered) 20 lb (80 g/m
2
)