Brother HL-5440D - Manual (Page 157)

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Appendix
A
1 Measured in accordance with the method described in RAL-UZ122.
Model HL-5440D HL-5450DN
Noise
Level Sound
Pressure Printing L PA m = 59 dB (A)
Ready L PA m = 34 dB (A)
Printing
(Quiet Mode) L PA m = 54 dB (A)
Sound
Power
1
Printing L WA d = 6.79 B (A)
Ready L WA d = 4.70 B (A)
Printing
(Quiet Mode) L WA d = 6.4 B (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)