[SNAG]

Hi there, I would like to enquire about the Sony MDR-RF975RK

http://www.sonystyle.com/home/item.j...93x8746&catid=

I understand that its a closed headphone system, so it will be great for me, as I need sound isolation.

From the website, I saw that the frequency for this was running RF 900mhz...
I am based in Singapore, and our mobile networks are running 900 and 1800mhz.. Anyone knows if mobile networks are also RF frequency networks?

So I was wondering if this will cause any interference for me... since both the mobile network and the headphone are 900mhz....

Anyway, would you recommend a headphone that is wireless, has decent sound reproduction, and is closed?

I've tried the Senheniser RS85, but they were open earphones..

Thanks a lot for your help!