1. The device has 4 channels (2 mono + 1 stereo). 2. It uses a USB power supply (DC 5V) and can be connected to a computer, power adapter, or mobile power supply. 3. The sound card connects directly to the computer via USB without the need for a driver. 4. It supports Bluetooth connection. 5. Each mono channel has +48V phantom power. 6. Each mono channel is equipped with an effect switch. 7. The recording method allows recording via USB or computer. 8. The effects include delay and repeat. 9. It is equipped with two wireless microphones with built - in receivers. 10. The color is black. 11. The material is metal. Contents of the package: 1. There is 1 Type B mixer. 2. There are 2 microphones. Only the above package contents are included, and there are no other products. Note: Light reflection and different monitors may cause the color of the item to vary slightly from the actual product. A measurement error of +/- 1 - 3 cm is allowed.