Electro-Harmonix
Nano Switchblade passive channel selector 

In
good condition

No
box 

The
Nano Switchblade is a footswitch pedal that switches the Y jack connection
between the A jack and B jack. The Switchblade can be used in two directions,
meaning the signal path can flow from A/B to Y, or from Y to A/B. Using the
Switchblade to switch between two instruments: plug the instruments into jack A
and jack B using 1/4” instrument cables. Then connect jack Y to the next device
in your signal chain (effects, if any, or amplifier if none). Use the
footswitch to switch between the instruments. Using the Switchblade to switch
between two amplifiers: plug the amplifiers into jack A and jack B using 1/4”
instrument cables. Then connect jack Y to the previous device in your signal
chain (effects, if any, or instrument if none). Use the footswitch to switch
between amplifiers. The Switchblade is not limited the above two applications.
Here are two more application examples: Y: Instrument—> Effects chain A,
effects chain B Y: Amplifier head—> Speaker cabinet A, speaker cabinet B (be
sure to use speaker cable and not instrument cable for this application). The
Switchblade is a passive device and requires no power supply, such as a battery
or power adapter. The Switchblade does not support stereo use and will only
work with 1/4” mono cables.