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 40dBImpedance: 1 Mohm 47k ohms 47k ohmsMaximum input level before clipping +9dBu +29dBu +49dBuOutput: 3-pin XLR connector, transformer balanced output. drive lines above 600 ohms. Maximum output level before clipping is +9dBu when using battery or phantom power.Frequency Response: 30Hz to 20kHz, +0/-1dBNoise: Less than -105dBu, unweighted, 22Hz to 22kHz, rmsxHarmonic Distortion: Less than 0.005% at 1kHz, OdBu output.Power:Phantom Power Requirement: +20 to +48 Current Draw: Phantom power, less than 8mA.Different batches may have different appearances, which not affect the use; different light or display may cause color difference in the actual productColour:Photo ColorMaterial:Aluminum AlloyPackage Contents:1x Active DI Box1x 9V BatteryOnly 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.