This is a TASCAM USB audio interface. Please note that the box has some folds and dents. I purchased this as a sub-unit, but since I haven't used it much, I'm putting it up for sale. Although it's in good condition, it's not a complete product, so please refrain from purchasing if you are very particular about condition. Please check the photos for the included accessories. A 4-input, 2-output USB audio interface with a built-in microphone preamplifier for high-quality recording. - Brand: TASCAM - Model: US-4x4 - Connection Type: USB - Microphone Preamplifier: Equipped - Monitor Balance: Adjustable I will copy and paste the product description below. ■ US-4x4 Features Ultra-HDDA (High Definition Discrete Architecture) microphone preamplifier achieving EIN -125dBu Supports high-resolution recording up to 24bit/96kHz format Compatible with Windows and Macintosh Connects to a computer via USB 2.0 Compatible with iOS devices such as iPad +48V phantom power supply available Supports direct guitar input Input level specifications boast a wide range of 57dB, supporting dynamic microphone input Zero-latency, delay-free direct monitoring function Robust full metal jacket that can withstand hard use Angled design that provides excellent operability on a desktop TRS analog balanced output terminals suitable for connecting powered monitors Standard phone jack headphone output terminal Volume control for line output and headphone output can be controlled separately MIDI input/output terminals for connecting MIDI keyboards, etc. Output source selectable on the setting panel Input sound monitoring method selectable from stereo/mono Input mute function to eliminate noise when no input is connected USB Audio Compliance 2.0 compliant Operation verified with major DAWs (SONAR, ProTools, Cubase, Live, Studio One, Garage Band) RoHS compliant product