EverTune ET001FB F7 model bridge system, Black. EverTune is a patented bridge system that keeps your guitar in tune under any conditions. The Evertune bridge is one of those inventions that has changed the face (literally) of guitar playing.
No longer must musicians and producers compromise on having perfectly tuned instruments. What is an Evertune Bridge?An Evertune Bridge is an entirely new approach to the subject of tuning. Previous bridges like the Floyd Rose have worked by locking the strings firmly at two points - the bridge itself and the nut - and they actually work extremely well, but for some, there's still a little too much slippage, or they just don't want that type of tremolo on their guitar. The Evertune operates in an entirely different way to anything we've seen on a guitar before: it's a mixture of physics, springs and levers, moving and working in real time to provide constant tension on each individual string. The Evertune bridge is a replacement for whichever bridge is currently on your guitar, and seems to be able to work on most electrics, from Strats to Les Pauls and every point in between. The Evertune bridge basically uses springs to provide a counterweight to the tension of the guitar strings.
This is hardly unusual in itself, since that's what all Stratocaster bridges do. Where the Evertune differs is in the fact that each string has its own corresponding spring, working independently from the others to keep that particular string in tune indefinitely.
Once tuned and set up, the player can enjoy an instrument that stays in tune always, even if the tuning pegs get knocked, and even (impressively) if heat and humidity alter the guitar in other ways: a real plus for touring musicians! Brand new without original box.
Please contact your nearest professional guitar luthier that could / able to install EverTune on your guitar.