What should I do with them? Or are they Unusable now ?

Hello, I have these Boat Rockerz 510 headphones and they are very old. It has been about 3 years since I have used them.. Is there anything possible I can do with them? Are they still usable? What should I do with them? I use Boat 'Airdopes' Alpha earbuds and haven't touch these headphones for years.. Thank You