{"title":"3inch E-Paper Module (G), 400 × 168, Red/Yellow/Black/White","handle":"3inch-e-paper-module-g-400-x-168-red-yellow-black-white","url":"/products/3inch-e-paper-module-g-400-x-168-red-yellow-black-white","description":"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.\n\nThe 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.\n\nSpecifications\n\n\nResolution – 400 × 168 pixels\n\nDisplay Colours – Red, yellow, black, white\n\nGrey Scale – 2\n\nDisplay Size – 70.4 × 29.568 mm\n\nOutline Dimensions – 88.5 × 41 mm\n\nDot Pitch – 0.176 × 0.176 mm\n\nOperating Voltage – 3.3V / 5V\n\nInterface – 3-wire SPI or 4-wire SPI\n\nFull Refresh Time – 12 seconds\n\nRefresh Power – <60 mW (typical)\n\nStandby Current – <0.01 µA (virtually zero)\n\nViewing Angle – >170°\n\n\nPin Definitions\n\n\nVCC – Power input (3.3V / 5V)\n\nGND – Ground\n\nDIN – SPI MOSI\n\nCLK – SPI SCK\n\nCS – SPI chip select (active low)\n\nDC – Data/command select (high = data, low = command)\n\nRST – Reset (active low)\n\nBUSY – Busy status output\n\n\nKey Features\n\n\nFour-Colour Display – Red, yellow, black, and white for eye-catching content\n\nUltra-Low Power – Only draws power during refresh; retains display content when powered off\n\nOnboard Voltage Translator – Compatible with 3.3V and 5V logic levels\n\nWide Viewing Angle – Over 170° for easy readability from any direction\n\nNo Backlight – Passively reflective, paper-like display\n\n\nIdeal For\n\nElectronic shelf labels and price tags\nBattery-powered status displays and signage\nIndustrial instruments and dashboards\n\n\nPackage Contents\n\n1× 3-inch E-Paper Module (G)\n","vendor":"Waveshare","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":876,"title":"Default Title","sku":"WS-22758","price":26.62,"compare_at_price":0.0,"on_sale":false,"in_stock":true,"available_quantity":10,"option1":"Default Title"}]}