The PQ12-R series micro linear servos operate as a direct replacement for standard rotary servos. They use the same standard 3 wire connector, ground, power and control. Regardless of how you drive your servos, be it with an RC receiver, an Arduino board, or a VEX micro-controller, the PQ12-R servo will function in place of a regular servo, but with the added benefit of providing linear motion. We offer several different models of the PQ12 with 3 different gearing options and different control options. NOTE: The PQ12-R will not operate with Futaba receivers like the R6014FS that output 2.7 volts. You will need a Smart Fly Power Expander or Orbit Power Jack to bring the signal level up to 5vdc for the PQ12-R to operate.