USB Himalayan Crystal Salt Lamp

Himalayan Crystal Salt Lamps emit negative ions (due to the heat on the salt) which have been found to have numerous benefits:

reduce or alleviate the symptoms of asthma and other respiratory ailments
improved quality of sleep
inducing a calm and relaxed state of being
neutralise the effects of electromagnetic radiation from computers
offering a softer, warmer light to an indoor space, preferable over bright, harsh lighting