Wireless Standard: IEEE 802.11 b/g/n Frequency: 2.4GHz Interface: UART/SPI Voltage: 3.3V
GNSS: GPS+Glonass or GPS+Beidou Interface: UART/I2C Voltage: 1.8V Antenna: Internal
GNSS: GPS+Glonass+Beidou Interface: UART Voltage: 3.3V Antenna: Internal
