JR Radio DS390HV Servo Digital Precision Micro MG JRPS390HV This is the JR Radio DS390HV Digital Precision Micro Metal Gear Servo.Features:Ultra precision electronicsIdeal for performance electrics, sailplanes and pylon modelsHigh-voltage application servoThin and lightweightDurable metal gear trainJR Radios DS390HV digital high-voltage precision micro metal gear servo gives you zero deadband, class-leading holding torque, and the legendary high resolution of JR Radio servo