No chuggee.... dunno what you were thinking when you wrote that. New head unit that will give as good Bluetooth as this £100+ fitting. This is £26 and doesn’t need wiring and is not a head unit. You method is more expensive and a lot more work.
Sorry guys edited to say used.
Probably better off buying a better head unit with hands free built in.
Why haven't you mentioned its 2nd Hand OP?
Worth mentioning that this is a used item.