GETS TEETH UP TO 4 SHADES WHITER IN LESS THAN 1 HOUR; 2 EASY STEPS; 2 MIN AUTO OFF TIMER; NO UNCOMFORTABLE TRAYS OR STRIPS—USER LEAVES SOLUTION ON TEETH FOR 2 MINUTES; KIT INCLUDES: ONE .34 FL OZ BOTTLE OF WHITENING GEL, WHITENING LIGHT, 1 SHADE GUIDE & 2 MOUTHPIECE ATTACHMENTS; REQUIRES 3 AA BATTERIES