Shenzhen SUMRING Technology Co. Ltd is a Hi-tech enterprise specialized in the research development of security and fire alarm products& including PIR detector smoke detector, gas leakage detector Carbon Monoxide detector, fire alarm bellstrobe siren manual call point, magnetic contact etc.brbrSUMRING continuously follows the trend of global advanced fire alarm and burglar alarm development> and has built long-term partnership with well-known American manufacturer aiming to be top enterprise in fire alarm , burglar alarm industry. High-tech industry good-quality products and high-level are our commitments to customers. Our products are widely exported to USA, Spain Italy, Portugal South Africa, Southeast Asia and Middle East.,br >brWe look forward to become your long-term strategic partner>