Executive Summary: 30000RPM by MistairhomeTL;DR: The WL-FAN rechargeable fan line puts a BLDC brushless motor (9300-30000 RPM, 28-120 CFM airflow), an 18650 / 21700 lithium cell with UL 1642 / IEC 62133 / UN38.3 certifications (2000-20000 mAh, 12-53 hour runtime), USB-C PD 3.0 fast charge (1.5-3.5 hours full charge) and BPA-free CPSIA-compliant materials into 8 form factors - which means one source factory covers handheld personal, desktop clip with phone stand, neck bladeles···