Your Nuraphone has an automatic on/off feature called Smart Response.
To power on: your Nuraphone will automatically power on when you put it on.
To power off: your Nuraphone will automatically power off to preserve battery when you take it off.
Automatic on/off only works when no cables are connected. When you finish listening, always remove all cables from your Nuraphone so that it powers off.
If your Nuraphone is brand new and won't turn on, try charging it for one hour on a 5V wall plug.
If you're having trouble powering your Nuraphone on and off, please select "I need more help" for some troubleshooting advice.