Highest quality rock salt mined from the Himalayan Mountains Powered from any USB port / USB adaptor (USB cable included), suitable for your office desk, living room, bedroom, kitchen or virtually any room Includes 2.5watt incandescent bulbs, emits negative ions that fight against electromagnetic radiation, fatigue and sluggishness, helps you sleep better, wake refreshed, breathe smoother, and soothe allergies. Use touch control options to turn the lamp on/off or change the colour of the LED light. Completely silent, no smells or fragrance, creating a stress-reducing environment