Elo TouchSystems ET1502L User Manual page 27

vi. Plug the digital device into a grounded outlet only. Do not use AC adapter plugs.
(Removing or cutting the line cord ground may increase RF emission levels and may also present a lethal shock hazard to the user.)
If you need additional help, consult your dealer, manufacturer, or an experienced radio or television technician.
User Manual ET1002L, ET1302L, ET1502L 27