From JHS Pedals:

Need to split your signal? Don’t want to settle for a
passive device that will kill your tone and cause signal loss? This is
what you need! This little box of magic takes your input signal and
splits it into two always-on outputs that are buffered so you don’t lose
clarity or tone in any way.

Here are some of the uses:

*Plug your guitar in and use one output to send your clean signal
somewhere like a mixer, separate amp, etc... and send the other output
through your board like normal.

*Use one output to send a constant signal to your tuner and the other
for your normal chain. This can help you defeat those volume pedal
“tuner out” horrors!

*Split your signal in any way you can imagine!

This pedal requires standard 9V DC Negative power, consumes less than 100mA, and measures 3.6"x1.5"x1"