4pk or 4pks

4pk 同 4pks 係吾係有好大分別???

I also want to know their differences

I also want to know too

With much lower latency (up to 2 times faster than the 4PK) and programming sophistication and advancements never before incorporated into a surface system, the 4PKS picks up where the 4PK leaves off. The LCD screen on the stylish transmitter lets you view up to 36 functions, and an adapter is included for repositioning wheel height and angle for maximum comfort and response.

A vibrator built into the grip can be programmed to serve any of several functions: as a lap timer, up timer, navigation aid or low battery alert. Extra protection features have been added, including High Voltage and Low Battery alarms, as well as automatic system shut-down after ten minutes of non-use.

And of course there's the precision and security of Futaba's acclaimed 2.4GHz FASST technology that is leading the way in radio control. Competitive drivers with their eyes on the prize have a new weapon for owning the winner's circle: the 4PKS!

thank you so much. !!