We are Taiwan manufacturer of fire alarm equipments since 1999. Our products with high reputation in the market including:  Fire Alarm Control Panels: conventional and addressable Control Panels, Remote Synchronized Auxiliary Console, High Rise Building Control Panel …  Detectors & Accessories & Addressable Device: Rate of Rise, Fixed Temperature Heat, Photoelectric Type Smoke, Addressable Modules, Addressable Manual Call Point, Fire Alarm Bell…  Broadcasting Systems: Broadcast Host, Broadcast and Music Broadcast host  Broadcast Devices: Amplifier, Programmable Timer, Digital Addressable Broadcasting System, Telephone Zone Selector Panel, Multi-functional Broadcasting Management System, Broadcasting Module, Remote-control Microphone…)  Speaker Series: Horn Speaker, Wall-mounted Speaker, Ceiling Embedded Speaker, Ceiling-mounted Speaker… (You can find more details about products in our website http://www.yun-yang.com.tw/en/index.php) We have ISO, CE, CNS certifications at present and we are going to get more significant certifications step by step.