With Cassette Adapter Bluetooth from Xtreme, your car's cassette player instantly becomes a wireless Bluetooth receiver. Just like that, you can stream music from any Bluetooth music player or phone. No complicated installation. No cables. No tangled or snagged tape. Just pop it in and it automatically turns on. Cassette Adapter Bluetooth contains a long-lasting rechargeable battery for even the longest road trips. Plus, you now have a hands-free solution for phone calls, thanks to the built in microphone.