A na-eme mkpado akara eriri USB site na halogen efu, anwụrụ ọkụ dị ala, toxicity dị ala, njikọ radieshon, mpempe akwụkwọ polyolefin UV kwụsiri ike, nke kpụrụ n'ime akara eriri USB ahaziri ahazi na onye na-ebu akwụkwọ, A na-eji ha maka njirimara eriri na eriri waya site na kọmpụta. na-ebi akwụkwọ na nrịbama, A na-ejikọta ihe nrịbama site na iji eriri eriri, akara akara a dị mma maka ngwa ebe njirimara ọkụ ọkụ dị oke mkpa, enwere ike iji ya mee ihe n'ọtụtụ dịgasị iche iche, mkpado akara bụ ezigbo mmiri mmiri, mmanụ ọkụ, lube na-eguzogide ọrụ na-adịgide adịgide ozugbo ibipụtasịrị. ma nọgide na-enwe ike ikwu okwu ọbụna mgbe ekpughere ya na abrasion, ihe mgbaze na-ehicha ihe ike, na mmanụ ụgbọala na mmanụ ndị agha.