Wide range of applications It can be placed on the head of the bed in bedrooms, study rooms, and living rooms, which can effectively relieve your fatigue and relax your body and mind. After turning on the light, "Schumann Wave" releases anti-radiation and comforts the mood. Produced at the same natural frequency as the human body - Schumann waves, it emits warm light through the spectrum emitted by the translucent crystal structure, which can relieve stress, stabilize mood and promote sleep. When the crystal salt block is heated, it can release negative ions. While purifying the air, it can effectively activate various enzymes in the human body, lower blood sugar, blood pressure and cholesterol, improve microcirculation, promote metabolism, and enhance immunity. Crystal salt rock The Himalayas were an ocean, but after geological changes and high temperature exposure, the ocean gradually disappeared. A amount of salt (NaC) is deposited on the seabed, and after 200 million years of geological extrusion and high temperature, underground minerals and sea salt eventually form crystalline . Also known as crystal salt, it releases natural negative ions and inhibits radiation Product Description lamp holder material wood modern style Model Rechargeable Salt Lamp Natural Type Color monochromatic warm light Voltage36V Color: Yellow Material: Package Contents: 1 x crystal salt lamp 1 x usb cable 1 x with Chinese and English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.