CPU and On Chip Memory: ESP32-D0WD-V3 embedded, Xtensa dual-core 32-bit LX6 microprocessor, up to 240 MHz 448 KB ROM for booting and core functions 520 KB for data and instructions 16KB in RTC WiFi: 802.11b/g Bit rate: 802.11n up to 150 Mbps A-MPDU and A-MSDU aggregation 0.4 µs guard interval support Center frequency range of operating channel: 2412 ~ 2484 MHz Bluetooth: Bluetooth V4.2 BR/ and Bluetooth LE specification Class-1, class-2 and class-3 transmitter CVSDand Peripherals SDcard, UART, SPI, SDIO, I2C, LED PWM, Motor PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, , TWAI® ( compatible with ISO 11898-1, . CAN Specification 2.0) Integrated Components on Module 40MHz crystal oscillator 16MB SPI flash Antenna Options On-board dual PCB antennas Operation Conditions Operating voltage/Power supply: 3.0 ~ 3.6 V Operating ambient temperature:-40 ~ 85 °C Color: Black Material: PCB+Metal There are differences in printing due to different batches, which not affect the use; there are color differences due to different lighting or displays Package Contents: 1 x Module 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.