The Beaver Elite 2.0 adds yet another feature to one of the most versatile of ultrasonic scalers. Its self contained water source makes the portability of this unit amazing. For a low price, you get all these other benefits too. Automatically selects which tip you are using. Either 25K or 30K with no switch to flip. 2 Position foot control with Boost control. Add to that the digital power adjustment and autotune, and you have one of the best scalers made. Then put a price tag of $675 on it, and include 2 additional tips in that price, and you have a deal you cant beat. Independent parts are user replaceable, too.