Enhanced failsafe is the feature to ensure that the helicopter will hover automatically when it loss the RC signal. After lossing the signal in a certain time period, ACE ONE will calculate the safest way to home position and control the helicopter to return home. The helicopter will hover over your GPS start point eventually. This feature will protect your expensive payloads and equipments very well.

Ace One is DJI's  latest generation GPS/INS based helicopter autopilot system that combines the highest level of precise measurements and environment-independent rate of INS updates. Ace One's exceptional performance meets the highest requirements for commercial use in the areas of industrial aerial photography to high-end military operations. It is smaller than our previous generation and weights in a mere 161 grams comparing to 650 grams with improved algorithm. Scale helicopter enthusiasts pay special attention to the compact size, light weight and exceptional scale style flying characteristics Ace One has to offer.

It works on all kinds of helicopter from Bi-blade to Multi--blade rotorcrafts; with or without flybar; various swash plates and rotor heads; electric or gasoline powered engines.
Ace One can be quickly and easily installed in all RC helicopter air frames.

Product Link:
http://www.dji-innovations.com/products/aceone/features/