I purchased a 1973 Rhodes Electric Piano 20 years ago and it had this pre-amp in it at the time. It was in perfect working condition, but I had it removed when I had some work done to it after I purchased it. It's been sitting in a container in a storage space ever since. I cannot confirm that this currently works and one of the connections from where the 9V battery would be installed has become detached (it is pictured). This is being sold as is. Good luck and let me know if you have any questions.