Features: 1) Decreases radiation and protects eyesight2) Activates physical strength and prevents diseases3) Removes smoke dust and refreshes air 4) High quality and reasonable prices5) Negative ion density: 3,000,000pcs/cm3Specifications:1) Working voltage: DC 5V2) Power: 5W 3) ABS fireproof plastic 4) We provide OEM serviceInner packing:Dimensions: 170 x 115 x 73mmWeight: 128gOuter packing:72pcs/ctnCarton dimensions: 495 x 357 x 330mm N.W.: 13.35kg producing area:China payment:T/T, L/C supplying capacity:50,000,000pcs/month