DG20TRLWW 20A Ground Fault circuit interrupter with professional action. 15A receptacle 20A feed-through at 120V. Cannot be reset if wired incorrectly. GFCI installs in place of standard outlets, back wire feature for easy installation. Green working indicator. Helps prevent electrical shock due to ground faults. For use in bathrooms, laundry rooms, near swimming pools or spas. Excellent quality made in China.