After 2 to 3 sessions settings, I could find the right tips and control buttons. It should be set before entering the water and properly drive ends. The big problem is that under the water with the volume up, it's a given background noise from outside noise (breathing, jacuzzi ...). Just used for running I think or lying on her bed In the documentation it is written that the security can disengage bypassing an alarm message but I never have the alarm message volume up. If you are afraid dabîmer ears with a walkman, it is ideal. He finished in the closet, I dare not sell me such a device, it would not be very honest. Too bad because the ergonomics and the fixing system is fine.
