The DI-1 Direct Inject Box by Boss is a professional-grade audio interface device designed to connect musical instruments, such as electric guitars and keyboards, directly to a mixing console or audio recording system. This DI box converts high-impedance, unbalanced signals into low-impedance, balanced signals, ensuring optimal sound quality and minimal signal degradation over long cable runs. The DI-1 features robust construction, making it durable for both studio and live performance environments. It also includes a ground lift switch to eliminate hum and buzz caused by ground loops, and a pad switch to handle high-output signals without distortion. Whether you're a musician, sound engineer, or audio technician, the DI-1 provides reliable and pristine audio signal conversion for your setup.