Features: 1. High-quality materials and long service life. 2. Compact size, lightweight, and portable. 3. Stable performance with plug-and-play functionality. 4. Equipped with the onboard ESP32-S2-WROOM module featuring 4MB Flash storage, compatible with PS49.0 flashing without requiring a USB cable. 5. No need for manual driver installation or firmware burning. Eliminates the need for repeated plugging and unplugging. Can remain continuously connected to the USB port for long-term stable operation and ease of use. The module used is the ESP32-S2-WROOM with 4MB Flash storage, suitable for PS49.0 flashing and switching. No USB cable requireddirect USB port connection for convenient usage. Default firmware is pre-installed and ready to use upon arrival, with no additional setup required. Parameter: ESP32-S2-WROOM is a general-purpose Wi-Fi MCU module with PCB onboard antenna, offering strong performance and a wide range of peripheral interfaces. Suitable for applications such as wearable electronic devices and smart home systems. MCU: Integrated ESP32-S2 chip, Xtensa single-core 32-bit LX7 microprocessor, supports clock frequencies up to 240 MHz 128 KB ROM 320 KB RAM 16 KB SRAM Wi-Fi: 802.11 b/g Data rate up to 150 Mbps Frame Aggregation (TX/RX A-MPDU, RX A-MSDU) 0.4 s protection interval Operating channel center frequency range: 24122484 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 Operating voltage: 3.03.6 V Recommended operating temperature range: -40C to 85C