These devices also require power, typically via an included usb and/or a wall plug, and some even feature built-in batteries that can last for hours.
Ngwaọrụ ndị a na-achọkwa ike, site na eriri USB na / ma ọ bụ nkwụ mgbidi, na ụfọdụ ọbụna atụmatụ wuru-na batrị ndị nwere ike ịta ruo ọtụtụ awa.