Hello. My problem is im using a navigation system via my smartphone. The problem is, that this device turns it self off after it does not receive any sound or something. when my navigation system doesnt call after some minutes (5 i think) it just turns off. i tought its broken but when i play music the music wont stop. it continues even after 30 minutes (i didnt test longer). is there a possibility to turn off the automatic funktion after "non usage" ?