what's funny is this one online fish store is selling them for 39.99 as wavemakers.

here is the description:
This is the perfect solution for your wave making needs. Why spend hundreds when you can spend $39.99 and get the same reliability and more functionality.
This product has been around for years in the music industry. It is a proven design and is extremely reliable. This the answer to your needs!
Perfect for Powerheads (slow chase)
Will preserve the life of your powerheads and pumps
4 plugs
Selector switch on unit for
2 channel or 4 channel
Speed control
3 position switch features:
Slow chase 1 min. to 15 min.
Fast chase 1 sec. to 1 min.
Sound -activation
15-amp rated
Shipping Weight: 1.5lbs
Power: Switchable 110v / 230v