Whirlwind ISOPOD Line Level Summing Balancer for iPod;

Housed in a high impact nylon casing, the ISOPOD safely sums to mono and transformer isolates unbalanced 1/8" (3.5mm) stereo connections to balanced, XLR. Nominal insertion loss = -6 dB Use to create a balanced mono signal from MP3 players and computers to send to professional mixers' line inputs.