This Vox Tone Bender is fully functional and in great condition.

From Stompboxes:

Probably the most iconic Tone Bender of all, say the words Tone Bender and this is the pedal most will think of. Originally made in 1966 the Vox Tone Bender had the longest run of all and was still being made in some form or another in the mid to late 1970's. While this pedal is branded as a Vox it doesn't mean it was a British made pedal, they were actually made in Italy. It could have been possible that the earliest units were made in England, as with the early Vox Wah pedals, but there is no direct proof for this. The very first Vox Tone Benders did have slightly different component values but most obvious of all had an OC76 transistor in the second position within the circuit. These early Vox units were fitted with a SFT337 and an OC76 and also had the input capacitor mounted beneath the circuit board. Models from approx 1967 still used the SFT337 but in place of the OC76 used a SFT363E and featured a top mounted input capacitor. If you compare the two circuits below you can see the obvious differences, this could purely be changes in suppliers as more units were produced or could be possible evidence for some of the earliest Vox units being made in England.

The tone produced by this circuit can be a little shocking at first if you are expecting a deep brick wall type of Fuzz Face type tone. The treble content is quite high for a fuzz pedal but makes for a very unique sounding effect and an excellent pedal to be used with dark sounding British valve amplifiers.