Waveshare 33507 ESP32-S3 4.2 Inch RLCD Full Reflective Display Development Board Supports Wi-Fi & BLE Dual-Mode Communication Without Battery

Features a high-performance Xtensa 32-bit LX7 dual-core processor with a clock speed up to 240MHz

1. 4GHz Wi-Fi and Bluetooth 5 (LE) with built-in antennas. Includes 512KB SRAM and 384KB ROM, while stack-integrated with 16MB Flash and 8MB PSRAM. Features a
2. 2-inch full-reflective display with 300 x 400 resolution, offering reflective imaging and eliminating the need for backlighting. Equipped with a dual-microphone array enabling audio algorithms like noise reduction and echo cancellation, ideal for precise voice recognition and near-field/far-field voice wake-up applications. Onboard PCF85063 RTC real-time clock and SHTC3 temperature/humidity sensor for precise RTC time management and environmental monitoring. Integrated 18650 lithium battery holder and RTC backup battery holder (requires rechargeable RTC battery), supporting dual-mode operation: main power supply and independent RTC backup. Onboard Micro SD card slot for external storage of images or files. Two customizable side buttons (KEY and BOOT) for developing user-defined functions. Reserved 2 x 8-row female header (2.54mm pitch) for external expansion. Specifications. Display panel: fully reflective screen. Display size:
3. 2 inches. Display resolution: 300 x 400. Gray scale levels: