Designed specifically to eliminate the hum and buzz that is often encountered when connecting the audio output from a consumer device to another. This stereo isolator features standard 3.5 mm input and output connectors for easy interfacing with headphone and ear-bud outputs.  Inside are two world-class Jensen audio transformers that deliver a ruler flat response from 10 Hz to 40 kHz and are able to withstand high output signals to +19 dBu without distortion. Rugged flange-mount design discretely mounts under a shelf or stereo stand. Passive design, does not require power.