Product Description GPS module, 3V-5V-powered Universal Ublox NEO-6M module comes with ceramic destined antenna, great signal strength (According to the ublox datasheet: Navigate down to –162 dBm and –148 dBm coldstart) The antenna is sperated to the module, they connects together via a removable clip-type connector, so you can feel free to mount the antenna away from the module. Including data backup battery Including EEPROM for data storage Antenna size 22 * 22mm UART protocol communication Documentation: Get all the datasheet, schematic and software on this page.