Key Features: Specifically Designed for Rock Crawling and Rock Racing Applications Included Aluminum 20mm Crowbar Servo Arm Full Aluminum Servo Housing Precision Cut Full Metal Gears ABEC5 Ball Bearings Digital Magnetic Position Encoder High Voltage Capable High Torque Coreless Motor 25T Output Spline Programmable via HotWire Interface Overload Protection Technology Thermal Protection Circuitry Low Voltage Alarm* Quiet, Efficient, Cool Operation HDAC: High Density Copper PCBs *requires HotWire sold separately Overview: Hit the trails hard with the Tekin T-440 Crawler Servo. Rocks, Mud, Dirt or Snow. The Element Proof Design means you can tackle any terrain. Full Metal Gear set, All Aluminum Housing, Digital Position Encoding and loads of Torque, this servo keeps you out of a bind. Fine-tune your setup with and extensive set of adjustments via Tekins HotWire PC Interface.