User Manual for VIVOSUN models including: VSV-IFB4 Inline Booster Duct Fan with Speed Controller, VSV-IFB4, Inline Booster Duct Fan with Speed Controller, Duct Fan with Speed Controller, Speed Controller, Controller
2023-09-24 — It is important not to touch or install this fan while it is running. The impeller is unguarded, and there is no fan guard included.
Inline Booster Duct Fan 8″ with Speed Controller, Low Noise for Grow Tents