Equipped with RISC-V 32-bit single-core processor, the operating frequency is up to 160 MHz with 320 KB ROM,512 KB SRAM,16 KB Low-power (LP) SRAM Support IEEE 802.11ax protocol, IEEE 802.11 b/g-compliant Support Bluetooth BLE 5 Integrated lithium battery charging chip Rich peripheral interfaces, including 23 GPIOs, UART, I2C, I2S, (TX/RX),LED PWM, etc. The ESP32- Development board is a versatile Wi-Fi, IEEE 802.15.4, and Bluetooth LE module with powerful features. It uses the ESP32- chip, equipped with RISC-V 32-bit single-core processor, has 4 MB external SPI flash memory, and integrates rich peripherals, including SPI, UART, I2C, on-board antenna, and up to 23 GPIO and other interfaces. Integrated lithium battery charging chip. Rich peripherals and high performance make this module Perfect for smart homes, industrial automation, healthcare, consumer electronics, and more. Model:ESP32--WROOM-1-N4 Module Chip:ESP32- chip, RISC-V 32-bit single-core processor, supports clock frequency up to 160 MHz Works in 2.4 GHz frequency band, 1T1R Supports Bluetooth Low Energy 5.0 4 x virtual Wi-Fi interfaces Support IEEE 802.11ax protocol Compatible with IEEE 802.11b/g protocols, supporting 20 MHz and 40 MHz bandwidth-data rates up to 150 Mbps Compatible with IEEE 802.15.4-2015 protocol, working in 2.4 GHz frequency band, supporting OQPSK PHY/Thread 1.3/Zigbee 3.0 Antenna form:onboard PCB antenna Support interface:UART, I2C, I2S, (TX/RX), LED PWM, USB Serial/JTAG controller, etc. Operating temperature:-40-85 Power supply range:0-3.6V Integrated lithium battery charging chip SPI Flash:4MB Colour:Black Material:PCB+Metal Size:37x24mm Package Contents: 1 * Development Board 2 * pin 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.