The UNI-T UDP3305C is a linear high-performance lab power supply that features two fully adjustable channels and one fixed channel. The adjustable channels can provide 150W of power each, over the range of 0-30V and 0-5A. The third channel provides a fixed current of 3A and a set of fixed voltages. Internally, the adjustable channels can be connected in series or parallel, delivering respectively a maximum voltage of 60V or a maximum current of 10A. The voltage and current knobs are fine adjustable and there are 5 buttons to save settings. The power supply includes shutdown-memory and will therefore keep saved settings even when powered down. The fan is temperature-controlled and will therefore be quieter depending on the load and temperature compared to models without a smart-fan. USB, RS232 and Digital IO interfaces are also present for communication with the power supply.

The 3rd channel is partially fixed for voltage and current fixed, which means that the current is not adjustable though, it is possible to set a different voltage from a set of fixed voltages (1.8 V / 2.5 V / 3.3 V / 5 V). The power supply also has one button to switch all channels on or off simultaneously.