Bonjour
small cost, size package sent to the USA unlikely any inspection
Commercial, industrial shipment, large quantities, value 100..2500 $ or more can be opened and inspection for safety and EMI compliance regardless of COE.
Your airbill and Commercial Invoice, custom documents must déclaration value and quantity and Harm number
Freight carrier passes information on to USCBP, etc
Non-compliance equipment is held up for compliance documents or refuse entre at POE.
Bon courage
Jon