Advanced Connectivity: Equipped With Esp32 For Wifi And Bluetooth Functionality, Ensuring Seamless Integration Various Devices Networks Multiple Frequency Support: Supports Frequencies 433mhz, Making It Versatile Different Regional Requirements Integrated Gps: Features A Module Precise Navigation Tracking Capabilities Enhanced Display: Comes An Oled Providing Clear Vibrant Visual Feedback Mcu: Esp32 Flash: 4mb Psram: 8mb Driver: Ch9102 Wireless Protocol: Wi-fi:802.11b/g/n Standard V4.2 + Ble Onboard Functions: Three Buttons (power I038 Reset), Pmu Management: Axp2101 Supply Mode: USB 18650 Battery Other Options U-blox Neo-6 Positioning Function Rtc Crystal Faster Hot Start External Interrupt/wake-up Semtech Long-distance Low-power Lora Transceiver High Sensitivity: As Low -148dbm, Transceiver Rate: Up To 300 Kbps (the Product Appearance Printed Words May Vary Depending On Batch, But This Does Not Affect Use) Colour:black Material:pcb Specification:unsoldered Oled Package Contents: 1 X Development Board Kit Only Above Content, Products Are Included. Note: Light Reflection Displays Cause Color Of Item In Picture Little From Real Thing. Measurement Allowed Error Is 1-3cm.