Features: Compact size passive metal direct box for converting a high-impedance line level and unbalanced output signal to a low-impedance microphone level and balanced input signal. With 1/4 TRS input & output jack and ATT switch for adjusting input attenuation(-0dB -20dB -40dB); One balanced male XLR output jack AES standard with pin-1 ground pin-2 hot and pin-3 cold. With one ground lift switch you can fully separate input and output grounding which can lower hum noise or ground loops. Minimizing unwanted noise distortion ground loops and maintaining signal integrity so that you can enjoy a rich and full sound. Frequently be used to connect an electric guitar or electric bass to a mixing console s microphone input jack. Specifications: Material: Metal Jack: 2 * 1/4 TRS; 1 * XLR Item Size: 12 * 7.5 * 4cm / 4.7 * 3 * 1.6in Item Weight: 370g / 13.1oz Package Size: 23.5 * 16 * 8cm / 9.3 * 6.3 * 3.1in Package Weight: 545g / 1.2lbs Package List: 1 * Audio Converter 1 * Users Manual(English)