1. 448 KB ROM,520 KB ,16 KB RTC 2. QSPI supports multiple flash/ 3. Built in 8 MHz oscillator 4. Support self calibration 5. Built in RC oscillator, supports self calibration Supports external main crystal oscillators ranging from 2 MHz to 60 MHz (currently only 40 MHz crystal oscillators are supported if Wi Fi/Bluetooth functionality is used) Supports external 32 kHz crystal oscillator for RTC, supports self calibration 2 timer groups, each consisting of 2 64 bit universal and 1 main system watchdog 1 RTC timer RTC watchdog 34 GPIO ports 12 bit SAR ADC, up to 18 channels Ethernet interface with dedicated DMA, supporting IEEE 1588 Dual Line Automotive Interface (TWAI) Compatible with ISO11898-1) IR (TX/RX) Product Parameters 1) for Adopting the V3 version module ESP32-WROOM-32E from 2) positioning hole diameter: 4.7mm, compatible with for 3) Software supports for Mixly, for IDE, for MicroPython Color: Black Material: PCB Package Contents: 1 x Esp32 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.