Fangrui Product Details 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 / 868 Mhz / 915mhz / 923mhz, Making It Versatile For Different Regional Requirements Integrated Gps: Features A Gps Module For Precise Navigation And 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/n 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 U-blox Neo-6 Gps Positioning Module: Supports Gps Positioning Function Onboard Rtc Crystal For Faster Hot Start Support External Interrupt/wake-up Semtech Long-distance Low-power Lora Ceiver High Sensitivity: As Low As -148dbm, Cei Designed For Modern Living