ESP32 1.9-inch Wi-Fi + BL Development Board Operating Voltage: 5V Serial Port Speed: 115200 BPS Frequency Range: 2412-2484 MHz Bluetooth Protocols: Bluetooth 4.2BR/ and BLE Wi-Fi Protocols: 802.11B/G Antenna Type: Onboard PCB Antenna with 2dBI Gain Supported Interfaces: UART, SPI, SDIO, , PWM, I2S, IR, ADC The ESP32-WROOM-32 is a universal Wi-Fi + BT + BLE module with low power consumption. It features Bluetooth and Wi-Fi for a wide range of applications, with integrated SPI flash memory. Wi-Fi supports wide-range wireless communication and can connect directly to the internet via a router; Bluetooth allows users to connect to a mobile phone for easy signal detection. Applications include Wi-Fi solutions, Wi-Fi Mini cameras, mesh networking, smart homes, and mobile IoT. Color: Black Material: PCB Package Contents: 1 * Development Board 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.