These servo controllers use joysticks to generate signals to control any hobby servo that responds to the RC PWM signal. This product is commonly used to control servos in a non-wireless condition where this product replaces a standard RC radio. This simplifies operation where wireless functionality is not needed. These products feature a machined plastic housing and precision joystick potentiometers to create a precise servo controller. Great for camera mounts, pan tilts, robotics control and testing, creative Halloween decorations etc. Does not include power adapter. Buy separately below. Note that all channels are fully proportional. Features spring return to center.