Zoom WSU-1 Hairy Windscreen HVAC Unlike common duct fans that

Unlike common duct fans that use an AC motor which is loud and unmanageable

(6 feet)    Product Performance and Technical Specs    Design    Rear Exhaust    Total Airflow    40 to 180 CFM    Total Noise    9 to 32 dBA    Static Pressure    2

9 ft3 of helium/air mixture is perfect for celebrations at home or on-the-go

Positioning tabs for 1/2" wall thickness assure accurate placement on stud

Zoom WSU-1 Hairy Windscreen HVAC Unlike common duct fans thatThe Zoom WSU 1 Hairy Windscreen is designed to reduce wind noise while remaining acoustically transparent. It can be used with the H1, H2n, H4n, H5, H6, and H3 VR Recorders as well as the iQ5 microphone and Q2HD Handy Video Recorder. Fits: H1, H1n, H2n, H4n, H5, H6, and H3 VR Recorders as well as the iQ5 microphone and Q2HD Handy Video Recorder ===