The Palmer PEABI is more than just a switcher for two sources; it also adjusts the levels of microphone or line signals. Whether it's a microphone or line signal, the PEABI seamlessly switches between the two inputs, allowing quick and easy signal comparison and the connection of two sources to a single input.

It features three slide switches that provide 15 dB of attenuation for input A and 6, 15, or 21 dB for input B. A ground lift switch is included to eliminate earth loop hum. Encased in a sturdy metal housing with protective extended edges, the PEABI ensures the safety of its inputs and output. An illuminated red LED indicates the active input.

The PEABI's circuitry is all-passive. A 9 V block battery is required to power the LED.