The shanghai european communications technology company ltd. Was established in 2008 with smart wear plus indoor and outdoor integration of location products and solutions. Provide complete product and industry application solutions for product development+ application cloud platform + mobile phone application + manufacturing. 15 years of oef communications focused on low-capacity, indoor and outdoor positioning and wireless communications applications (4g, nbiot, emtc, lora, bluetooth, gps beacon, wifi, uwb, etc.)