Features: 1. High quality materials, , and have a long service life. 2. Small in size, light in weight, and convenient to carry. 3. Stable performance, plug and play. 4. The onboard ESP32-S2-WROOM module has a FIash storage capacity of 4MB and can be used for PS49.0 flashing without the need for a USB cable.5. There is no need to tinker with driving and burning firmware on your own, and there is no need to repeatedly plug and unplug. It can be continuously plugged into the USB port for long-term stable operation and convenient use. Description: The module used is ESP32-S2-WROOM, with a FIash storage capacity of 4MB, which can be used for PS49.0 flashing and switching. No USB cable is required, and it can be directly plugged into a USB port for more convenient use.The default firmware burned can be used immediately upon arrival, without the need to tinker with the driver to burn the firmware, and without the need for repeated plugging and unplugging. It can be continuously plugged into the USB port for long-term stable operation and convenient use. Parameter: ESP32-S2-WROOM is a general-purpose Wi Fi MCU module that uses PCB onboard antennas, with powerful functions and rich peripheral interfaces. It can be used in scenarios such as wearable electronic devices and smart homes. MCU: Built in ESP32-S2 chip, Xtensa ® Single core 32-bit LX7 microprocessor, supporting clock frequencies up to 240 MHz 128 KB ROM 320 KB 16 KB Wi Fi: 802.11 b/g Data rate up to 150 Mbps Frame Aggregation (TX/RX A-MPDU, RX A-MSDU) 0.4 µs protection interval Working channel center frequency range: 2412~2484 MHz Hardware: Module interfaces: GPIO, SPI, LCD interface, UART, I2C, I2S, Camera interface, IR, pulse counter, LED PWM, USB 1.1 OTG, ADC, , touch sensor, temperature sensor 40 MHz integrated crystal oscillator 4 MB SPI flash Working voltage/supply voltage: 3.0~3.6 V Suggested working temperature range: -40~85 °C<b