This is untested I don’t own a charger for it The Unbranded NEC MobilePro 400 Handheld Personal Computer is a vintage device manufactured in Japan by NEC. This handheld computer is a collectible piece of technology that offers a glimpse into the past with its retro design and capabilities. The NEC MobilePro 400 is a unique piece for vintage computing enthusiasts who appreciate the historical significance and craftsmanship of early handheld computers.