Essence STU USB DAC & Amp

The alternating current voltage range that the product accepts from its power source, expressed in volts (V). It indicates the minimum and maximum supply voltages compatible with the device.

A list of the cable types that are supplied with the product, such as USB, HDMI, VGA, DisplayPort, LAN (RJ‑45), SATA, audio or other relevant connectors.

The span of frequencies, expressed in hertz (Hz), that a device can operate within or respond to. It may be given as a single value, a numeric range (e.g., "20 000‑50 000 Hz"), or an open‑ended interval such as "2.4 GHz+" indicating the lower bound only.

Indicates the types of headphone or earphone connections available on a product, such as wired jacks (e.g., 3.5 mm), USB‑C, Lightning, or wireless Bluetooth. The value may list one or more connection types separated by commas.

Indicates whether the product provides a dedicated audio line‑out port for connecting external speakers or audio equipment. A value of "Yes" means the device has such an output; "No" means it does not.

The type of electrical supply that powers the device, such as mains electricity, batteries, USB power, or a combination of these options.

Represents the count of external USB 2.0 (high‑speed) connectors available on a device. The value is an integer indicating how many USB 2.0 ports can be used for data transfer or power delivery from the outside of the product, regardless of internal placement or version.