Sturdy metal case. The all-metal shell design is stable and durable, effective protection against minor bumps and falls. Built-in high-speed digital processor. Extremely low distortion High-precision signal digital processing. No delay monitoring. Ultra-low latency. Enables flexible monitoring during recording and mixing. Compatible with most mainstream audio recording software. Number of preamplifiers 4 A/D resolution 24-bit/192kHZ Number of Instrument/Mic Inputs 4 Phantom Power 48V DC Connection port USB Connection protocol USB2.0 Size mm (HxWxL) 51 mmx121 mmx260mm Analog output RL Appearance structure desktop Headphone output 2 Power supply mode support USB power supply/T-YPEC What's in the box 4 Channel recording audio interface x1 Type C Power cable x1 User manual x1