Being supported by an advanced and professional IT team, we could offer technical support on pre-sales & after-sales service for China Commercial Air Purifier, Travel Air Purifier , Heat Recovery Ventilator Installation , Hepa Floor Air Purifier ,Home Ionizer Air Purifier . We sincerely do our best to offer the best service for all the clients and businessmen. The product will supply to all over the world, such as Europe, America, Australia,Bulgaria , Guinea ,Hungary , Albania .We set a strict quality control system. We have return and exchange policy, and you can exchange within 7 days after receive the wigs if it is in new station and we service repairing free for our products. Please feel free to contact us for further information and we will offer you competitive price list then.