Reefkeeper question?

[FiReBReTHa]

So for the $99 it comes with the PC4?

Yup!

http://www.digitalaquatics.com/saltwater/RKL

Three levels to chose from:
Basic: ($99.99)
1 x Head unit
1 x PC4 (4 outlets)
1 x temperature probe

you can then program the headunit for all the features you can imagine!