Input: 1/4inch single jack connector (tip live, sleeve grounded) or 3-pin XLR connector (pin 2 live), unbalanced. Parallel link output 1/4inch jack connector for feeding other devices directly or through a buffer amplifier. Attenuator at 0dB; At 20dB; At 40dB Impedance: 1 Mohm 47k ohms 47k ohms Maximum input level before clipping +9dBu +29dBu +49dBu Output: 3-pin XLR connector, transformer balanced output. Will drive lines above 600 ohms. Maximum output level before clipping is greater than +9dBu when using battery or phantom power. Frequency Response: 30Hz to 20kHz, +0/-1dB Noise: Less than -105dBu, unweighted, 22Hz to 22kHz, rmsx Harmonic Distortion: Less than 0.005% at 1kHz, OdBu output. Power: Phantom Power Requirement: +20 VDC to +48 VDC Current Draw: Phantom power, less than 8mA. Different batches may have different appearances, which will not affect the use; different light or display may cause color difference in the actual product Colour:Photo Color Material:Aluminum Alloy Package Contents: 1x Active DI Box 1x 9V Battery Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.