The OKY2103 is a prototyping and shielding module that is specifically designed for use with Arduino boards. The module offers a variety of features, including an adjustable voltage regulator, on-board switches and an onboard terminal block for wiring. The module has a wide range of applications, including multiple sensor applications, remote control projects, motor controllers, and data acquisition projects. The overall design of this shield is simple, yet durable and reliable. It is produced by OKYSTAR, a reputable manufacturer of electronic components.