All equipment provided by the company is six months guarantee from the time of installation, and one year since is carrying. after sales service group do all their efforts in providing technical services to customers. in order to achieve company goals of increasing customer satisfaction Kahrobagostar company attempted to install automated systems to receive comments and complaints from customers with Direct telephone line that has been control by managing director every day. Please if there are any complaints, comments or any follow up on current affairs , contact telephone number 0311-2614002 and declare your opinions. noted the necessary actions is immediately and within 24 hours after the call was done. Thanks in advance for the cooperation and appreciation to Your Excellency perfection we are. Our goal is your satisfaction and confidence.