Shenzhen Zhongzhiyu Technology Co., Ltd. is a leading professional manufacturer of fire-fighting products and intelligent security voice alarm products. Our company is mainly engaged in the research and development, sales of gas detection and measuring instruments and providing technical services to customers. With rich production Experience and advanced management system products are exported to Europe, North America, South America, the Middle East, Southeast Asia, Australia and other countries and regions. We have passed the ISO9001 international quality management system certification to meet the strict quality requirements of our customers. Most of our products have passed CE, Rohs, REACH, SGS and EN50291 certification to meet the strict quality requirements of customers. We always provide customers all over the world with high-quality products at competitive prices.