Does sonar / autopilot / manual control work up to 400m? Do I need a separate range extender?

The Deeper Quest can achieve a range of up to 400 meters, applicable to manual control, autopilot, and sonar functionalities. A robust range extender is integrated into the remote controller, and the radio technology of both the controller and bait boat is specifically designed for extended range. No separate range extenders are required to utilize the sonar or autopilot within the 400-meter range - you have it available right from the start.