This is a 1.3-inch monochrome OLED display module with a native 128×64 pixel resolution, powered by the mature SH1106 display driver chip. It provides two hardware versions for flexible selection: a 4-pin IIC (I2C) variant and a 7-pin SPI variant, with both white and blue luminous screen color options available for each version. The module supports a wide 3V~5V input voltage, perfectly matching the power logic of mainstream microcontroller boards like Arduino and Raspberry Pi. It has a compact PCB outline of 35.5×33.6×1.2mm, a clear 29.42×14.7mm display area, and can work stably in a broad temperature range (the 4-pin model works from -20℃~70℃, while the 7-pin model extends to -40℃~80℃). It comes with pre-drilled mounting holes for easy physical fixation in DIY electronics, embedded devices, smart wearables and audio equipment, and can render clear text, playback progress bars, audio spectrum visualizations, icons and other graphical content.

It dual-supports mainstream IIC and SPI communication interfaces in two pin layouts: the 4-pin IIC version saves GPIO resources for compact projects, while the 7-pin SPI version delivers faster refresh speeds for dynamic content like audio spectrum animation. Users can pick the pin definition that fits their circuit design perfectly, and both versions have optional blue/white luminous colors to match visual style demands.

As a self-luminous screen, it needs no backlight, bringing ultra-high contrast, nearly 180° full viewing angle, and low power consumption ideal for battery-powered portable devices. The 0.23mm dot pitch ensures sharp, fine text and graphics output, far more readable than small-size LCD screens under dim or bright ambient light.

The wide 3-5V voltage input eliminates the need for extra voltage conversion modules, and the two temperature-grade options let it adapt to both indoor consumer electronics and harsh industrial low/high-temperature scenarios. The SH1106 driver has optimized frame buffer stability, so screen content won’t glitch easily under minor power fluctuations.

Standard mounting holes simplify enclosure installation, and clear pin definitions lower wiring errors for hobbyists. It has broad software ecosystem support, with abundant open-source code libraries for mainstream development platforms, greatly cutting development difficulty for makers.

Its core function is to act as a compact, low-power human-machine interaction display terminal for embedded systems: it receives control and data signals from main controllers via IIC/SPI interfaces, and stably outputs clear monochrome text, numerical data, icons, dynamic audio spectrum, playback progress and other visual content. It realizes real-time data visualization and interactive UI display for small-scale electronic projects, which is the foundation for its wide use in audio players, smart sensors, handheld meters, IoT gadgets and DIY maker works.