Nope, dont have to turn it on or off..... when i enter the car, it automatically connects, when i leave the car it automatically disconnects.... and the battery last ~ 2 months before i have to recharge it.
This is a great point. I have a similar one that i got from staples. The sound and everything is great. But it stays on when i turn off the car. and when i call someone from inside my house, the call gets transferred to that receiver from my phone in the middle of the conversation. So I always have to turn it on/off when i enter/exit the car. So i have stopped using it.