This is a used item, purchased from another site and displayed. The neck appears straight to the untrained eye. String height at the 12th fret is approximately 2.5mm for the 6th string and 2.3mm for the 1st string. It seems the previous owner made various customizations. All switches respond, but their effects are unknown. The set screw for raising and lowering the 6th string is stuck. Half of the back of the neck has had its finish removed. There is reportedly space for two 9V batteries and two AA batteries on the back of the body, but this has not been confirmed. Sold as-is, with no returns or refunds (3N).