The four little feet on the bottom minimize movement on a slippery table but i have also glued a nonskid pad to the bottom of one to be sure

All in all it is perfect for a bedside power supply

I dont need my power plug present but could use it if needed in the 110v receptacles i keep 1 lightning and microusb cords plugged in at all times and a 6 phone cord handy if i want to charge and use the phone simultaneously