Reshow Bluetooth Cassette Adapter for Car with Stereo Audio, Wireless Cassette Tape to Aux Adapter Smartphone Cassette Adapter (Black)

does it come with a charger?

The descriprion touts hands-free calling but one of the Q&A responses says call audio doesn't come through car speakers. Can you clarify how it works?

Can it charge while it is inserted into the dash or would I need to take it out charge it then re-insert it?

Can I put this into a cassette player like a Walkman and get Bluetooth songs from my phone?