Take a look at the new electronic gear from KP&P:

http://www.kpnp.net/?p=7152&lang=en

http://en.mastaekwondo.com/2014/04/adidas-kp-p-launches-new-electronic-headgear/

If you watch the videos they show the differences between the Daedo PSS and the KP&P systems.

I like the electronic aspect of the scoring capabilities. I can see the many possibilities both for and against. However, I've not always liked events that use things other than humans to rule over decisions during live events. Call points the old fashioned way; the old fallible human!!

Thank you, Danielle for the info.