Advanced Connectivity: Equipped with ESP32 for WiFi and Bluetooth functionality, ensuring seamless connectivity and integration with various devices and networks Multiple Frequency Support: Supports multiple frequencies 433MHz / 868MHz / 915MHz / 923MHz, making it versatile for different regional requirements Integrated GPS: Features a GPS module for precise navigation and location tracking Enhanced Display: Comes with an OLED display providing clear and vibrant visual feedback MCU: ESP32 FLASH: 4MB PSRAM: 8MB Driver: CH9102 Wireless protocol: Wi-Fi: 802.11b/g/n Bluetooth: Bluetooth V4.2 + BLE Onboard functions: Three buttons (power + I038 + reset), PMU power management: AXP2101 Power supply mode: Supports USB power supply and 18650 battery power supply u-blox NEO-6 GPS positioning module: Supports GPS positioning function Onboard RTC crystal for faster hot start; supports external interrupt/wake-up Semtech long-distance low-power LoRa transceiver High sensitivity: as low as -148dBm; receiver rate: up to 300 kbps Product appearance and labeling may vary slightly by batch; this does not affect performance Color: Black Material: PCB Package Contents: 1 x Development Board Kit Note: The package includes only the items listed above. Other accessories are not included. Note: Lighting and display settings may cause slight color variations between the image and the actual product. Measurement error allowed is +/- 1-3 cm.