kircuit new global 19v ac/dc adapter replacement compatible with asus vg278 series vg278q 27" eye care gaming led-lit monitor, ms227 ms227n 22" led lcd monitor 19vdc power supply kircuit kircuit ac adapters are tested and designed to meet the power needs of your device. this adapter converts ac power into the dc power required by your device. this supply allows you to operate your device or charge its battery from electrical power outlets. kircuit adapters are a portable power source for when your on the go, at home or office. this adapter has been validated and tested to ensure it will work with your device.