ESP32 WROVER B 8MB 64Mbits SPI flash Specifications:- RF certification: FCC/CE-RED/IC/TELEC/KCC/SRRC/NCC Bluetooth certification: BQB Green certification: RoHS, REACH Test Reliability HTOL/HTSL/uHAST/TCT/ESD Wi-Fi Protocols: 802.11 b/g/n (802.11n up to 150 Mbps) A-MPDU and A-MSDU aggregation and 0.4 µs guard interval support Frequency range: 2.4 GHz ~ 2.5 GHz Bluetooth Protocols: Bluetooth v4.2 BR/EDR and BLE specification Radio: NZIF receiver with –97 dBm sensitivity Class-1, class-2 and class-3 transmitter AFH Audio: CVSD and SBC Hardware Module interfaces SD card, UART, SPI, SDIO, I2C, LED PWM, Motor PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, DAC, Two-Wire Automotive Interface (TWAITM, compatible with ISO11898-1) On-chip sensor: Hall sensor Integrated crystal: 40 MHz crystal Integrated SPI flash: 4 MB Integrated PSRAM: 8 MB https://www.campuscomponent.com/products/esp32-wrover-b-8mb-64mbits-spi-flash/2208614000001841395