Use low-power dual-core 32-bit CPU, which can be used as an application processor. The main frequency is up to 240MHz, and the computing power is up to 600 DMIPS, Built-in 520 KB SRAM Support UART/SPI/I2C/PWM/ADC/DAC and other interfaces Support OV2640 and OV7670 cameras, built-in flash Support picture WiFI upload, Support TF card, Support multiple sleep modes.(note: Different batches may have different appearance, which does not affect use.) Spec: SPIFlash default 32Mbit RAM internal 520KB Wi-Fi 802.11b/g/n/e/i Bluetooth Bluetooth 4.2BR/EDR and BLE standard Support interface (2Mbps) UART,SPI,I2C,PWM Support TF card,maximum support 4G IO port 9 Serial port rate default 115200bps Spectrum range: 2400~2483.5MHz Antenna form Onboard PCB antenna,gain 2dBi Image output format:JPEG (only OV2640 support),BMP,GRAYSCALE Packaging method DIP-16 Transmit power 802.11b:17±2dBm (@11Mbps) 802.11g:14±2dBm (@54Mbps) 802.11n:13±2dBm (@MCS7) Receiving sensitivity CCK, 1Mbps:-90dBm CCK, 11Mbps:-85dBm 6Mbps(1/2BPSK):-88dBm 54Mbps (3/464-QAM):-70dBm MCS7 (65Mbps, 72.2Mbps):-67dBm Power consumption Turn off the flash:180mA@5V Turn on the flash and adjust the brightness to the maximum:310mA@5V Deep-sleep:The lowest power consumption can reach 6mA@5V Moderm-sleep:the lowest can reach 20mA@5V Light-sleep:the lowest can reach 6.7mA@5V Security WPA/WPA2/WPA2-Enterprise/WPS Working temperature:-20℃~70℃ Storage environment:-40℃~125℃,Less than90%RH Application: Home smart device image transmission Wireless monitoring Smart agriculture QR wireless recognition Wireless positioning system signal And other IoT applications Screen type:A-Resistive Material:plastic+metal colour:Black+Y