I've had a pair of Sennheiser HD280s for at least a decade. Honestly, they don't need advances. They still work perfectly. The foam wore off the band, but I

I've had a pair of Sennheiser HD280s for at least a decade. Honestly, they don't need advances. They still work perfectly. The foam wore off the band, but I replaced it. For my application, batteries and bluetooth would cause a lot more problems than they solve. For my use case, they're basically perfect.