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 including 923MHz, making it suitable for different regional requirements Integrated GPS: Features a GPS module for precise navigation and tracking capabilities Enhanced Display: Includes an OLED display for clear and vibrant visual feedback MCU: ESP32 Flash Memory: 4MB PSRAM: 8MB Driver: CH9102 Wireless Protocol: Wi-Fi 802.11b/g/n Bluetooth: Bluetooth V4.2 + BLE Onboard Functions: Three buttons (power, IO38, reset), PMU power management via AXP2101 Power Supply Options: Supports USB power and 18650 battery power GPS Module: u-blox NEO-6 for GPS positioning Onboard RTC crystal for faster hot start; supports external interrupt and wake-up Semtech long-distance low-power LoRa transceiver High sensitivity: as low as -148dBm; transceiver rate up to 300 kbps Note: Product appearance and printed markings may vary slightly by batch; this does not affect performance Color: Black Material: PCB Specification: Unsoldered OLED Package Contents: 1 x Development Board Kit Note: Other items not included Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement tolerance: +/- 1-3 cm