Model: Deep Silence 120 mm - 1,800 rpm The 120 mm models of the Deep Silence fan series are supplied with a 7 volt adapter cable. At 12 volts the fan rotates at 1,800 revolutions per minute. The Deep Silence 120 mm generates an air flow of 72.1 CFM at a noise level of 19.9 dB(A). Using the 7 volt cable reduces the speed to approx. 1,100 rpm, which generates and air flow of 34,7 CFM at 12,2 dB(A). Model: Deep Silence 120 mm - 1.800 rpm Rotation Speed (12 V) 1.800 rpm (+/- 10%) Rotation Speed (7 V) 1.100 rpm (+/- 10%) Voltage Range 5 - 12 V Rated Current 0,26 A Rated Power 1,92 W Airflow (12 V) 72,1 CFM Airflow (7 V) 34,7 CFM Airflow (12 V) 122,5 m³/h Airflow (7 V) 58,9 m³/h Acoustical Noise (12 V) 19,9 dB(A) Acoustical Noise (7 V) 12,2 dB(A) Static Pressure (12 V) 1,69 mm H2O Static Pressure (7 V) 1,05 mm H2O Cable Length 44 cm Connector 3-Pin (incl. 7 V Adaptor) Durability 80.000 h