This is Luan from Guangzhou Ouyang Security and Building Material Technology Ltd., Co,China. We are a professional supplier of automatic door and Automatic door operator . We produce remote control garage door,automatic sliding door , automatic swing door opener, rolling shutter,etc. If you are interested in our product or you have any question about our product , please contact me .Thanks and Best Regards!SincerelyLuanTel 86-13826032132Mob 86-13760677858Fax 86-20-32772805Ali Trade manager : gzaficWebsites: http://gzafjc.net.cn/ Guangzhou OUYANG Security and Building Material Technology Ltd., Co.