The GPS-4303 is a part of GW Instek's Power Supply series. Designed for testing and controlling the voltage and current flows within a system, the GPS-4303 offers a wide range of features and functions that ensure efficient and reliable power supply operations. It has a fixed output voltage range of 0-30V and an output current of 0-3A with precision setting at 1mV and 1mA resolution. It also offers selectable transfer characteristics including CV, CC, and CP modes to maximize performance. The built-in memory function allows for the storage of up to 10 sets of calibration data for fast and easy reference. The GPS-4303 also features a user-friendly front panel with pushbuttons and LED indicators that display information on parameters such as voltage level, current level, overload/protection status, and more. Additionally, the GPS-4303 has a built-in timer function, with settings ranging from 1msec to 999.9 hours, and a series of other functions to enhance performance.