This product accepts the high impedance(usually unbalanced) signal and"convert" it to a balanced ones.

Model No of direct box.: HOT-DIFrequency Response : 20Hz-20KHzNoise Level (22Hz - 22KHz,Input Shorted) : -100dBuTHD+N (10Hz-22KHz) : 0.01%typ.@1V RMS,1KHz Max.lnput Level (1%THD) :+6dBu Input : One 1/4 Phone Jack, Unbalanced Output : One XLR connector, BalancedLink Output : One 1/4 Phone Jack, UnbalancedPAD switch : 0dB, -20dB, -40dB setting GROUND / LIFT SwitchBattery : 9V Dimensions:158 x 100 x 50mmWeight:0.4kgAPPLICANT:This Active Direct Box takes a signal from an instrument (guitar, bass, keyboardand etc.) and, by presenting a very high impedance to the instrument and balancingthe output, prepares it for direct connection to a studio or live mixing console.      

Direct Box