Features: 1. Compact USB Dongle Design – Shaped like a small U-disk, this ESP32 board is sleek and portable, making it ideal for space-sensitive applications such as Bluetooth/Wi-Fi gateways, USB adapters, and embedded projects. 2. Powerful ESP32-D4 Core – Built around the ESP32-D4 chip with 4MB Flash, delivering reliable performance for IoT development, wireless connectivity, and programmable control. 3. Stable USB-Serial Connection – Features the CH343P USB-to-serial chip for smooth communication and easy programming via USB. 4. Integrated Ceramic Antenna – Provides solid wireless signal reception without the need for an external antenna, keeping the design neat and functional. 5. Ready for Custom Firmware – Fully compatible with popular frameworks like MicroPython and ESPHome, so you can quickly flash, customize, and deploy your code. Product Details: This ESP32 development board combines a compact U-disk form factor with robust hardware—ESP32-D4 chip, 4MB Flash, CH343P USB-serial interface, and a built-in ceramic antenna. It’s perfect for creating Bluetooth/Wi-Fi gateways, acting as a USB dongle, or embedding into IoT prototypes. The transparent housing shows off the PCB, and the tool-free usability makes it great for both beginners and experienced makers. Specifications: - Chip: ESP32-D4 - Flash: 4MB - USB Interface: CH343P - Antenna: Ceramic antenna - Color: Transparent housing - Material: PCB + Plastic shell - PCB color may vary (random selection) - Note: Slight color or size variations may occur, which do not affect performance. Package Includes: 2 × ESP32 Development Board (Only the items listed above are included.)