Onboard PCB antenna, 2dBi802.11b: 17+2 dBm(@11Mbps) Built-in 520 KB RAM, external 4M PSRAM Low-power dual-core 32-bit CPU for application processors Supporting OV2640 and OV7670 cameras, built-in flash Supporting interfaces such as UART/SPI/I2C/PWM Specifications: SPI Flash: default 32Mbit RAM: internal 520KB + external 4M PSRAM Bluetooth: Bluetooth 4.2 BR/ and BLE standards Wi-Fi: 802.11 b/g/e/i Support TF card: maximum support 4G IO port: 9 Serial port rate: default 115200 Image output format:JPEG (only supported by OV2640), BMP, GRAYSCALE Colour: as shown Material: ABS Size: 4.8 x 2.7cm Package Contents: 1 x WiFi Bluetooth Development Board Only the above package content, other products are not included. Note: Light 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.