A 3-inch four-colour e-paper display module from Waveshare, capable of displaying red, yellow, black, and white. With ultra-low power consumption and a wide viewing angle of over 170°, the display retains its content even when powered off — ideal for price tags, shelf labels, and battery-powered signage.

The module connects via SPI and includes an onboard voltage translator for compatibility with both 3.3V and 5V microcontrollers. Development resources and examples are provided for Raspberry Pi, Arduino, and STM32.

Specifications

• Resolution – 400 × 168 pixels
• Display Colours – Red, yellow, black, white
• Grey Scale – 2
• Display Size – 70.4 × 29.568 mm
• Outline Dimensions – 88.5 × 41 mm
• Dot Pitch – 0.176 × 0.176 mm
• Operating Voltage – 3.3V / 5V
• Interface – 3-wire SPI or 4-wire SPI
• Full Refresh Time – 12 seconds
• Refresh Power – <60 mW (typical)
• Standby Current – <0.01 µA (virtually zero)
• Viewing Angle – >170°

Pin Definitions

• VCC – Power input (3.3V / 5V)
• GND – Ground
• DIN – SPI MOSI
• CLK – SPI SCK
• CS – SPI chip select (active low)
• DC – Data/command select (high = data, low = command)
• RST – Reset (active low)
• BUSY – Busy status output

Key Features

• Four-Colour Display – Red, yellow, black, and white for eye-catching content
• Ultra-Low Power – Only draws power during refresh; retains display content when powered off
• Onboard Voltage Translator – Compatible with 3.3V and 5V logic levels
• Wide Viewing Angle – Over 170° for easy readability from any direction
• No Backlight – Passively reflective, paper-like display

Ideal For

• Electronic shelf labels and price tags
• Battery-powered status displays and signage
• Industrial instruments and dashboards

Package Contents

• 1× 3-inch E-Paper Module (G)