More information (links):
* Hitec HPP-21 Instruction Manual (.pdf)
* Hitec HPP-21 Software Download (.zip)
The advantage is yours, when you choose to use Hitec digital servos programmed with the HFP-21 Hitec digital servo programmer and "all brands" servo tester. HPP-21 will fine-tune all your Hitec digital servos for optimum performance, and is the perfect answer to "matching" sets of servos for those big planes.
Works with all HS-7xxx G2, some HS-5xxx servos. See instruction manual for details. Mini USB cable not supplied (Available at most electronic stores).