Advanced Connectivity: Equipped with ESP32 for WiFi and Bluetooth functionality, ensuring seamless connectivity and integration with various devices and networks<br>Multiple Frequency Support: Supports multiple frequencies 433Mhz / 868Mhz / 915Mhz / 923Mhz, making it versatile for different regional requirements<br>Integrated GPS: Features a GPS module for precise navigation and capabilities<br>Enhanced Display: Comes with an OLED display providing clear and vibrant visual feedback<br>MCU: ESP32<br>FLASH: 4MB<br>PSRAM: 8MB<br>Driver: CH9102<br>Wireless protocol: Wi-Fi:802.11b/g/n<br>Bluetooth: Standard Bluetooth V4.2 + BLE<br>Onboard functions: Three buttons (power + I038 + reset), PMU power management: AXP2101<br>Power supply mode: Supports USB power supply + 18650 battery power supply and other options<br>u-blox NEO-6 GPS positioning module: Supports GPS positioning function<br>Onboard RTC crystal for faster hot start Support external interrupt/wake-up<br>Semtech long-distance low-power LoRa ceiver<br>High sensitivity: as low as -148dBm, ceiver rate: up to 300 kbps<br>(The product appearance and printed words may vary depending on the batch, but this does not affect use)<br>Colour:Black<br>Material:PCB<br><br>Package Contents:<br>1 x Development Board Kit<br>Only the above package content, other products are not included.<br>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.