Hightech compact fans with bionic loop rotor (BionicLoopFan). The special wing shape triggers turbulence in the air. This physical effect reduces the volume which is based on turbulances in the air flow and reduces energy consumption. With a straightened air flow and a higher Airflow these fans usually offers a higher overall cooling capacity over classical fans .Features:- 100% developed in Germany- T�V-certified sound level specifications = real data- Extremely low-noise bionic loop rotor- position-invariant magnetic bearing NB-NanoSLI 2NEW!- silent NB-EKA P2 Drive NEW!- Bayer Makrolon rotor with anti-dust technology- weighted reinforced fibreglass PBT frame- NB cable management with two pluggable connection cables- Perfect results for PC casing, CPU cooling systems and radiator( higher cooling power at same revolution ratel)Specification:- Dimensions: 140 x 140 x 25 mm- Volume: max. 28.5 dB (A)- Speed: max. 1,400 U / min- Airflow: max. 178.29 m / h- Static Pressure: 1,570mmH2O - Start voltage: 4 V- Power consumption: 1.92 W- Connector: 3-Pin- Life expectancy: 160,000 hours- Warranty: 6 yearsContents:- 4 fine thread screws and knurled nuts for tool free assembly- 4 NB silicone slics for vibration-free assembly- each 2x 20 and 50 cm connection cable with textile sheath