Waveshare 4.2 inch 400x300 E-Ink Display Module, SPI Interface
SKU: 16558343732

Waveshare 4.2 inch 400x300 E-Ink Display Module, SPI Interface

$46.80 $52.00
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Description

Waveshare 4.2 inch 400x300 E-Ink Display Module, SPI InterfaceOverview 1. This is an E Ink display module, 4. 2inch, 400x300 resolution, with embedded controller, communicating via SPI interface. 2. Due to the advantages like ultra low power consumption, wide viewing angle, clear display without electricity, it is an ideal choice for applications such as shelf label, industrial instrument, and so on. Features 1. No backlight, keeps displaying last content for a long time even when power down 2. Ultra low power

Overview
1. This is an E-Ink display module, 4.2inch, 400x300 resolution, with embedded controller, communicating via SPI interface.
2. Due to the advantages like ultra low power consumption, wide viewing angle, clear display without electricity, it is an ideal choice for applications such as shelf label, industrial instrument, and so on.

Features
1. No backlight, keeps displaying last content for a long time even when power down
2. Ultra low power consumption, basically power is only required for refreshing
3. SPI interface, for connecting with controller boards like Raspberry Pi/Arduino/Nucleo, etc.
4. Onboard voltage translator, compatible with 3.3V/5V MCUs
5. Comes with development resources and manual (examples for Raspberry Pi/Arduino/STM32)

Specifications
1. Operating voltage: 3.3V~5V
2. Interface: 3-wire SPI, 4-wire SPI
3. Outline dimension: 103.0mm × 78.5mm
4. Display size: 84.8mm × 63.6mm
5. Dot pitch: 0.212 × 0.212
6. Resolution: 400 × 300
7. Display color: black, white
8. Grey level: 2
9. Full refresh time: 4s
10. Refresh power: 26.4mW(typ.)
11. Standby power: <0.017mW
12. Viewing angle: >170 degree
13. Weight: 0.052 kg

Interface
1. SYMBOL: DESCRIPTION
2. VCC: 3.3V~5V
3. GND: Ground
4. DIN: SPI MOSI pin
5. CLK: SPI SCK pin
6. CS: SPI chip selection, low active
7. DC: Data/Command selection (high for data, low for command)
8. RST: External reset, low active
9. BUSY: Busy status output, low active

Package contents
1. 4.2inch e-Paper Module x1
2. PH2.0 20cm 8Pin x1


Specification:
Package Weight
One Package Weight 0.07kgs / 0.15lb
One Package Size 15cm * 9cm * 2cm / 5.91inch * 3.54inch * 0.79inch
Qty per Carton 320
Carton Weight 15.00kgs / 33.07lb
Carton Size 60cm * 36cm * 40cm / 23.62inch * 14.17inch * 15.75inch
Loading Container 20GP: 308 cartons * 320 pcs = 98560 pcs
40HQ: 716 cartons * 320 pcs = 229120 pcs

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
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
SKU: 16558343732

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Karen M
Massapequa, US
★★★★★ 4
I think so
I can't remember but l think they are good. I don't car keys as much when l remember to take them.
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Reviewed in the United States on November 26, 2025
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William S.
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★★★★★ 5
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Jacqueline
Phoenix, US
★★★★★ 3
Not what I thought
Not what I thought would be helpful to me,memory is about the same,haven’t seen any improvement.
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EDC
Battle Creek, US
★★★★★ 5
Good Results
I am not a doctor, but I can attest that Qunol Brain Health Focus Plus is working for me. I must confess that I am no spring chicken and was experiencing memory problems that go along with aging. Furthermore, my doctor has me wearing an oxygen tube, and I was worrying about what happens to my brain when something goes haywire in that department. I began to search for an OTC product that might help and noticed that the claims of one product widely advertised on TV were not supported by research while Qunol does have scientific support. I've used the product for several months now and have indeed noticed a decrease in my symptoms. I feel confident recommending the product to others in the same situation.
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William King
Port Orchard, US
★★★★★ 1
Useless
Of all the supplements I've tried, this was the biggest waste of money. I just finished the bottle and honestly can say I gave it a good shot, but really it is as useless for memory as a multivitamin would be. Furthermore so expensive and each dose is 2 hard white pills. I've been using brain supplements since college and literally this is useless.
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Reviewed in the United States on February 6, 2026

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