Panasonic TV Channel item use

Hi to all,
i have a panasonic tv, i use the the panasonic tv binding.
But there is a problem by using the Channel and volume items.
there are only switch for channel up or channel down .
i think it si better to use some thing like this :
Number TvKanal “Channel [%.1f]” {panasonictv=“wohnz_tv:CHANNEL, INCREASE:wohnz_tv:CHUP, DECREASE:wohnz_tv:CHDOWN, *:wohnz_tv:CHANNEL” }
but it dosent work.
also it very slow to klick one channel up.
Did anyone a better control or can give me a nice idea ?