70Watt Universal Auto Notebook AC Adapter Introduction Grenosis Universal Auto 70W Notebook AC Adapter easy to use and automatically sets the correct output voltage for a wide range of notebook when you add the appropriate connector tip. Output voltage is verified on the tips connector and the in-built surge protection circuitry gives ultimate protection to your notebook. Grenosis 70-Watts of portable power source for home， office or on the road offers a versatile replacement of the secondary power supply for your notebook.