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Ships within 48 hours · Estimated delivery Jul 6 - Jul 11
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Description
ESP32-S3 4.2 Inch RLCD Full Reflective Display Development Board Supports Wi-Fi & BLE Dual-Mode Communication Without Battery, 335071. Features a high performance Xtensa 32 bit LX7 dual core processor with a clock speed up to 240MHz 2. Supports 2. 4GHz Wi Fi and Bluetooth 5 (LE) with built in antennas 3. Includes 512KB SRAM and 384KB ROM, while stack integrated with 16MB Flash and 8MB PSRAM 4. Features a 4. 2 inch full reflective display with 300 x 400 resolution, offering reflective imaging and eliminating the need for backlighting 5. Equipped with a dual microphone array
1. Features a high-performance Xtensa 32-bit LX7 dual-core processor with a clock speed up to 240MHz
2. Supports 2.4GHz Wi-Fi and Bluetooth 5 (LE) with built-in antennas
3. Includes 512KB SRAM and 384KB ROM, while stack-integrated with 16MB Flash and 8MB PSRAM
4. Features a 4.2-inch full-reflective display with 300 x 400 resolution, offering reflective imaging and eliminating the need for backlighting
5. 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
6. Onboard PCF85063 RTC real-time clock and SHTC3 temperature/humidity sensor for precise RTC time management and environmental monitoring
7. 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
8. Onboard Micro SD card slot for external storage of images or files
9. Two customizable side buttons (KEY and BOOT) for developing user-defined functions
10. Reserved 2 x 8-row female header (2.54mm pitch) for external expansion
Specifications
1. Display panel: fully reflective screen
2. Display size: 4.2 inches
3. Display resolution: 300 x 400
4. Gray scale levels: 2
5. Communication interface: SPI
6. Display method: fully reflective
7. Driver IC: ST7305
8. Display colors: black, white
9. Size: about 9.25 x 6.91 cm
Packaging list:
- ESP32-S3-RLCD-4.2-EN host x 1
- Acrylic stand x 2
- 8-ohm 2W MX1.25 2PIN speaker (forward) 80mm x 1
- Screwdriver x 1
Specification:
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 2018 reviews
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Product Reviews
★★★★★ 4
Backpack Backpack
Size: Small, Color: Pink Dino
Cute, definitely a perfect size for my tall 3 yr old. (3’7”) I did have to let it air out though. Has a weird smell.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 31, 2026
★★★★★ 5
Two words: Double. Zipper.
Size: Small, Color: Purple
Great backpack for transitioning out of diaper bag but not yet ready to fling caution to the wind and leave the house with nothing. The real win on this is the double zipper. Zipping one way only is the worrrrst, and you don’t have to with this. So if you end up getting another one, that’s fine, but do yourself a favor and confirm the double zipper.
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Reviewed in the United States on January 1, 2026
★★★★★ 5
Nice daycare bag
Size: Small, Color: Purple
Easy for my 2 year old to carry to her day care . She keeps all her stuffs (12 oz bottle , lunch and snack box, an extra pair of clothes ) in it
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Reviewed in the United States on April 25, 2026
★★★★★ 5
Perfect for any toddler
Size: Small, Color: Pink Dino
It is the perfect size for any toddler. It is easy to clean. There is a small pouch in the inside to help with organization. My daughter is able to zip it up with out any trouble. Great quality for the cost.
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Reviewed in the United States on November 20, 2025
★★★★★ 5
Comfortable
Size: X-Large, Color: Organic Cotton 5 Black Pack
Waist band and band around thighs are 4/5 because theyre almost nonexistent. That's the kind of underwear/shorts I feel most comfortable in. The shorts are pretty breathable and the only thing I disliked was how short it was, but thats on me. True to size. It wasnt a loose fit but it wasnt super tight.
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Reviewed in the United States on August 26, 2025