Long sought and found low

I have already ruled several headphones tried with an adapter on my sine 501 on what I unfortunately due to the nature of the adapter (matched by the design is not entirely in the socket) has not yet succeeded. Alternatively, the headphones were'm really 40 upwards too expensive. Bluetooth so no one could say exactly whether it is compatible with the sinus or work. Better a headset with 2 listeners would have been me. This headset works with the Sinus 501 (the operation on the handset I certainly have not tested: -o, because I do not need this function.
For the price of 13,80 (incl. Shipping) I'm happy and satisfied to be able to make calls freihändich again.

A slight drawback I could find these days: The plug slips easily seeeehr a piece of the jack on the phone, so you do not hear anything more.