Specification: Working voltage: TYPE-C 5V SPI FLASH: Default 32MBIT Serial port speed: 115200BPS Frequency range: 2412-2484MHZ Bluetooth-compatible protocol: Bluetooth-compatible 4.2BR/EDR and BLE standards WIFI protocol: 802.11B/G/N Antenna form: onboard PCB antenna, gain 2DB Supported interfaces: UART, SPI, SDIO, I2C, PWM, I2S, IR, ADC, DAC Product size: about 54 * 28 * 10mm/2.12 * 1.10 * 0.39inch Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x Development Board 1. WiFi and Bluetooth-compatible Features: The ESP32 WROOM-32D module is a versatile WiFi+BT+BLE MCU module that supports both low-power Bluetooth-compatible and WiFi connectivity, providing wide application potential. 2. Integrated SPI Flash: The module has an integrated SPI flash that allows for fast and reliable data storage, making it more efficient for various applications. 3. Wide Range of Wireless Communication: With built-in WiFi support, the module can connect to the internet directly via a router, allowing for efficient wireless communication and data transfer over long distances. 4. Easy Signal Detection: The module's Bluetooth-compatible capabilities allow users to detect signals easily and conveniently via their mobile devices, making it ideal for signal detection applications.