It can make the effect chain 100% True By Pass,
ie the signal from the guitar or any other instrument, goes to the amplifier without any effect.
The power supply is via a 9V Boss type DC adapter.
Because the circuit is Passive the pedal can used without power supply
(But without lighting the Led).
Also available in vertical version.
Dimensions: 12cm x 9cm x 3.2cm).
Price: 40 Euro