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 868Mhz, making it versatile for different regional requirements Integrated GPS: Features a GPS module for precise navigation and tracking capabilities 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 Bluetooth: Standard Bluetooth V4.2 + BLE Onboard functions: Three buttons (power + I038 + reset), PMU power management: AXP2101 Power supply mode: Supports USB power supply + 18650 battery power supply and other options NEO-6 GPS positioning module: Supports GPS positioning function Onboard crystal for faster hot start Support external interrupt/ long-distance low-power LoRa transceiver High sensitivity: as low as -148dBm, transceiver rate: up to 300 kbps (The product appearance and printed words depending on the batch, but this does not affect use) Colour:Black Material:PCB Specification:Unsoldered OLED Package Contents: 1 x Development Board Kit Only the above package content, other products are not included. 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.