NGAI-CHEONG, founded in 1981, is a leading manufacturer specializing in power supply products registered with ISO9001.

Diversify our products ranging from OEM products, power supplies, battery chargers, electronic accessories and technological solutions

Keystone's core technology is in low-power high radio frequency product design and manufacturing.

Over 30 years of OEM/ODM contract electronics assembly manufacturing services

Experienced in OEM/ODM contract manufacturing of soldering irons, woodburning pens, and other DIY heating tools