TRANBALL group protection is a professional brand that is based on intelligent modules, networked instruments, controllers, recorders and other products, and integrates the services of the Keyun platform as the basis, and comprehensively provides integrated and comprehensive intelligent instruments and systems engineering. Group protection is trustworthy to the masses, and provides guaranteed, stable and reliable intelligent instruments and meters. Qunbao is a professional brand in the field of instruments of Shanghai Ledu Intelligent Technology Co., Ltd. It is our historical mission to provide high-performance intelligent instruments and meters.