USB Power Himalayan Crystal Rock Salt Desk Lamp Night Light With Wood Base & E14 Bulb & Switch, Size:2-3kg 1. Lamp body material: crystal rose salt 2. Lamp holder material: solid wood 3. Style: Natural 4. Voltage: 36V 5. Light source: E14 6. Air purification: acting as a natural negative ion generator, continuously releasing negative ions to absorb dust and purify the air 7. Radiation protection: emit electromagnetic waves after lighting, naturally adjust and suppress high-frequency electromagnetic waves generated by electrical appliances 8. Handmade, different shapes 9. High-purity crystal salt extracted from the Himalayas, carefully hand-made fashion decoration 10. The unique lighting atmosphere helps to relax the mood and relieve stress 11. Applicable area: 1.5-2 kg is suitable for less than 3 square meters; 2-3 kg is suitable for 3-5 square meters; 3-5 kg is suitable for 5-7 square meters; 5-7 kg is suitable for 7-10 square meters; 7-10 kg is suitable for 10-20 square meters 12. Size: 1.5-2kg 10x16 cm; 2-3kg 11x18cm; 3-4kg 12x20cm; 4-5kg ??13x22cm; 5-6kg 14x25cm; 6-7kg 15x26cm; 7-8kg 16x28cm; 8-9kg 17x29cm; 9-10kg 18x30cm (1-3 cm error) 13. Weight: 1-2 kg; 2-3 kg; 3-5 kg; 5-7 kg; 7-10 kg 14. Note: Each shape is not exactly the same, it is formed naturally, because the purity and composition of minerals will produce different colors, so the color of each salt lamp has a certain difference