Looking to connect your laptop or media player to a sound system? Check out the Rolls DB125, an audio presenter DI kit that accepts unbalanced stereo RCA inputs and outputs the signal to a summed transformer-balanced XLR output. The device features a variable attenuator, which allows you to set the best level and a ground-lift switch to eliminate hum. It's well suited for AV presentations from a laptop or rehearsing with backing tracks for a live performance. The DB125 includes a soft case, a dual RCA cable, a 3.5mm to dual RCA cable, and an XLR cable. The unit is passive and requires no power to operate.