The ASUS U90W-01 is a 90W AC Adapter with three different connector tip sizes which ensures compatibility with an array of devices. You could even lend it to friends and colleagues who use different ASUS notebooks and Ultrabooks. The U90W-01 supports international voltage standards (100-240V, 50-60Hz), allowing you to go anywhere when you need it. Multiple output protection, including Over Voltage Protection (OVP), Over Current Protection (OCP), Over Temperature Protection (OTP) and Short Circuit Protection (SCP) are built in to keep you and your laptop safe.