Features:1) Produces approximately 500 - 950 negative ions per cc2) Size: approximately 8 x 14" 3) Light bulb: comes with a 10 watt bulb, can accommodate up to 25 watts4) Mounted on a wood stand 5) Power: 110 volt6) Electric cord 7) Replacement bulbs should be a "candle lamp bulbs" with screw-on base 8) To replace bulb, unscrew the base of the salt crystal lamp and replace the bulbInner packing: color box We can also provide:1) Rock crystal salt lamp (electric light) up to 35 to 65mm diameter hole 2) Rock crystal salt dandles weight 1 to 3kg 3) Rock crystal salt (size 2 to 5mm) 4) Rock crystal salt lumps (original conditions of salt stone) 5) Rock crystal salt powder 6) Rock crystal salt in all variations7 )Natural bath salt crystals producing area:China payment:T/T, L/C at sight