With the Dual-Rate-Reverse Module, the servo travel can be continuously adjusted from 0.5 to 125% using the rotary knob, allowing for reduction or even amplification. Additionally, the switch on the module allows you to determine the servo rotation direction (Reverse). These features make the module ideal for a second elevator servo, for increasing travel on landing gear servos, and for steering in RC cars. It is compatible with almost all common analog servos. Test it out; you will be impressed. Continuously adjustable servo travel from 0.5 to 125%. Servo reverse can be turned on and off. Hold function in case of signal loss or interference. Suitable for both analog and digital servos.