1.3" OLED Blue Display Module with Regulator Box Header It's a RGB LED Common

It's a RGB LED Common Cathode 4 Pin

Pin Type  Male & Female

peak current capability up to 1

This is an excellent plastic pinion gear

It can quickly measure the USB port's output voltage as well as the device's operational current or load voltage

1.3" OLED Blue Display Module with Regulator Box Header It's a RGB LED CommonThis 1. 3" monochrome OLED is basically a 128x64 dot matrix display module with an I2C interface. It's ideal for Applications that require a very small display. When compared to LCD panels, OLED displays offer a variety of benefits, including high brightness, self emission, high contrast ratio, slim outline, broad viewing angle, wide temperature range, and low power usage. Specification Resolution 128 x 64 Visual Angle >160 Input Voltage 3. 3V ~ 6V