Deliver reliable 48V phantom power for condenser microphones and transfer audio signal to computer sound card or relevant audio device. Ultra low-noise audio performance and full-frequency response. Made of high quality aluminium metal material and adopting surface anodic oxidation treatment the product is sturdy durable. Stable filter circuit design to filter out AC signal interference and shield external audio device interference Suitable for personal recording professional recording studio radio stations live programs classrooms lectures conference rooms and so on.