Set of 4 YAMAHA TP80 drum pads - Brand: YAMAHA - Model Name: TP80 Used with a YAMAHA DTX Version 2.0 electronic drum set. I connected them to a module and confirmed that they produce sound. I lack detailed knowledge, so I haven't checked the fine dial switches, etc. Please consider these as junk items. The items are used. The condition at the time of inspection is described, but there is no guarantee that the condition will be maintained upon arrival or during use. Please keep in mind that these are items with risks, and consider purchasing them with the possibility of repair or parts replacement.