●Nordic nRF52820 embedded ARM Cortex M4
●Support multiple protocols:
    Bluetooth 5.2, ANT/ANT+, 2.4GHz proprietary protocol, 802.15.4 Thread and Zigbee.
●Bluetooth 5.1: 2/1Mbps, 500 kbps, 125 kbps
●IEEE 802.15.4-2006: 250 kbps
●Proprietary 2.4 GHz: 2 Mbps, 1 Mbps
●Support Bluetooth 5.1 AOA/AOD positioning
●Internal integrated DC-DC converter
●Serial debug interface (SWD)
●Nordic SoftDevice Ready
●Over-the-air firmware upgrade (OTA)
●Flash/memory: 256KB/32KB
●18 general I/O pins
●Low-power analog comparator with low-power wake-up
●12-bit/200KSPS ADC
●2 two-wire master/slave serial interfaces (I2C compatible)
●2 SPI master/1 slave serial port
●1 asynchronous serial port UART (with CTS/RTS and DMA)
●USB 2.0 full-speed controller (12 Mbps)
20-channel programmable peripheral interconnect (PPI) independent of the CPU.
●Quadrature Demodulator (QDEC)
●128-bit AES hardware encryption
●4 x 32-bit timers, 2 real-time counters (RTC)
●TX transmit power: +8dBm～-20dBm in 4 dB steps
●Built-in PCB antenna
●Size: Approximately 15.4x15.4 x1.8mm
●No external components required
●Working voltage: 1.7～5.5V