http://www.johnlewis.com/sennheiser-momentum-on-ear-headphones-with-mic-remote/p585447

Im thinking of buying these for OH for Xmas. I I know nothing about headphones whatsoever except I know you need different sorts for different things. He only has an elderly but good MP3 player at the moment,which he loves because it apparently plays CD's as well as compressed discs , so would these headphones be suitable for it please? (Cant remember if its a battery or mains MP3 - does it matter?)

Connections 3.5mm jack

Is the most common size.

6.3 mm is the old HiFi size for big head phones.

Its the jack size headphone done need any other power normally.

Thanks Mark.

If the Jack doesn't fit, you can buy an adapter that will alter the Jack size to fit.

http://www.ebay.co.uk/itm/GOLD-3-5M...und_Vision_Other&hash=item5aef673510