About Us Our History Founded by MIT graduates, X-SENSE is a pioneer in early smoke and carbon monoxide alarms; R&D by us, we utilize the newest and finest technology and material to provide quality products to our customers; We provide free technical support to all our clients. Our Factory All of our smoke alarms and carbon monoxide alarms have passed strict testing by third-party testing authorities including VDS, TÜV Rheinland, BSI, UL and ETL. In addition to the ISO9001:2008 certifification of our manufacturing department, we are aiming to implement BSCI, a leading supply chain management system, in 2018. Our Product Now, we will continue to take smoke and carbon monoxide alarms as our core product line utilizing advanced sensor and wireless technologies. Besides, we have been laying out a comprehensive product line of home safety products like smoke alarms, carbon monoxide alarms, home security systems, home environment monitoring systems and more. Product Application Home, office, building etc. Our Certificate CE, VDS, TÜV Rheinland, BSI(EN14604), UL(UL217 & UL2034) and ETL. Production Market North America and Western Europe hold 90% market share of our products. Our Service X-SENSE has earned the trust as a leading global brand for smoke, CO and fire alarms, improving the safety of families all around the world. We passionately thrive to maximize reliability, usability and functionality utilizing most advanced technology that you can count on.UL Combination Carbon Monoxide And Smoke Gas Detector website:http://www.smoke-detector.com/