... . It has been widely used on M2M fields, such as intelligent transportation, smart grid, industrial automation, telemetry, finance, POS, ... 21ns Time pulse Configurable, 0.25 to 1000Hz Hardware System CPU Industrial 32bits CPU FLASH 4MB(Extendable to 16MB) SDRAM ... Baud rate: 110~230400 BPS Indicator "Power", "Online", "GPS", "System", "Link/ACT" Antenna Cellular: Standard SMA female interface, 50 ohm ...