RMRC Servo Tester &amp; Centering Tool - Drone racing - FPV - RC Airplane - Works with any servo<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Manual， Neutral， and Auto modes for servo control</li><li>4.8-6v Input voltage</li><li>Can operate up to 3 servos at once</li><li>Durable case with RMRC logo</li><li>50x39x24mm， 20g</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51NDFqA6e6L.jpg" noproxy>