The mixer is equipped with input amplification and high- and low-frequency adjustment. The built-in 48V phantom power is suitable for direct power supply to condenser microphones, high-resolution headphone outputs, MP3 players, Bluetooth receivers, and a connected PC audio card. The mixer is compact and lightweight, connecting directly to your computer's USB port for power supply. No additional power supply is required. It can be used by connecting your computer to the power supply via USB, eliminating the need for an external adapter. Product type: Audio mixer console Power supply: Mobile power or USB Channels: 4 Total harmonic distortion: 0.1 % Frequency response: 20Hz-20KHz/0.5dB Signal-to-noise ratio: 80dB MAX outputs: 4V/MAX MIC impedance: 2.4ohm Mono impedance: 11 Stereo impedance: 100 Parametric EQ High: 12KHz/15dB Parametric EQ Low: 80Hz/15dB Color: Black Material: ABS Dimensions: 15x18x5,5cm Package content: 1 x audio mixer 1 x USB cable Only the above package content included; other products not included. Note: Light and different screens may cause slight color differences between the item in the image and the actual product. The allowed measurement error is +/- 1-3 cm.