V9 GNSS RTK SYSTEM 1.Seamlessly Compatible CORS System 2.Soundable Intelligent RTK GPS System 3.attractive price V9 GNSS RTK SYSTEMNoble ... with 2 keys and 3 LED indicators, plus intelligent voice navigation.USBCommunicationPort64M large capacity of FLASH memory ... 50kmTechnique Parameter1, Receiver Component2,Internal UHF Radio Component3,GSM Module4,Port Component5,Panel Key-Press and Lamp6, ...