Advanced Connectivity: Equipped with ESP32 for WiFi and Bluetooth functionality, ensuring seamless connectivity and integration with devices and networks<br> Multiple Frequency Support: Supports multiple frequencies 923Mhz, making it versatile for different regional requirements<br> Integrated GPS: Features a GPS module for precise navigation and tracking 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<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> NEO-6 GPS positioning module: Supports GPS positioning function<br> Onboard crystal for faster hot start Support external interrupt/wake-up<br> long-distance low-power LoRa transceiver<br> High sensitivity: as low as -148dBm, transceiver rate: up to 300 kbps<br> (The product appearance and printed words depending on the batch, but this does not affect use)<br> Colour:Black<br> Material:PCB<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.