Noctua NF12 5v USB fan - A PC cooling fan powered by USB - A quick look. - YouTube
Noctua NF-A4x10 PWM 40mm x 10mm Ultra Quiet Silent Fan 3-Pin Premium Cooling Fan for CR-10 S4/CR-10 S/CR-10/CR-10 S5/CR-10 mini 3D Printer - Walmart.ca
Noctua NF-A4x20 PWM - Case fan - LDLC 3-year warranty