Do these headphones limit the volume for kids?

The listed features do not include a volume limiter. If you want a hard cap on loudness for a young child, check that before buying or compare with kids' models that state a limit.

Can they be used with a cable?

They are described as wireless Bluetooth headphones, with no wired mode listed. Once the battery is empty you would need to recharge before listening again.

What can the microphone be used for?

The built-in mic handles voice calls and online classes from a paired phone, tablet or computer. It is not a boom mic, so it picks up from the ear cup.

How long does the battery last?

Battery life is not stated in the product details. Expect a full day of typical kids' listening from most wireless over-ears in this class, but charge overnight for heavy use.

Will they fit a young child?

They are over-ear headphones made for children, and the folding headband helps with storage. Fit depends on head size, so check the listed dimensions if your child is at the small or large end.