Ships free w/$45 order. If you want free shipping - get 3 of these. You'll want to keep at least 2 of them. Really, you will! If not, they make wonderful gifts.
I love these small lamps! They emit such a beautiful soft glow. Don't know if they really 'purify' the air; do know they are calming. Lovely night light. 52 reviews w/an almost perfect 5 score.
"Hand carved Himalayan salt crystals. When the lamp is lit, it emits negative ions that fight against positively charged particles like allergen, smoke, dander, pollens and other air pollutants that cause a stuffy and sluggish feeling. You can change the color of the bulb to give a different hue to the lighting area. Helps eliminate Allergens, Smoke, Dander, Pollen and other air pollutants"
Please see link for full description.