For added performance, we recommend the REEFS 8.4V EZ-BEC For programming, the USB Link is required The Reefs RC Triple4 Smart Servo Winch can be used as either a Winch or Steering servo. Switch from Winch to Steering servo with a couple clicks on the REEFS Software, using the optional programmer (SEHREEFS64 - not included). This fully programmable, high-speed and torque brushless servo winch is a versatile addition to your rig. With the included spool, silicone coated steel braided line, and scale recovery hook this part is ready to get to work as a winch. Combine this with steel gears and a CNC aluminum casing, and you have a dependable servo that offers 2-in-1 flexibility. Features: Submarine Waterproof: 7-point Seals 7075 Low Pro CNC Spool w/ Clear Finish 7' Silicone Coated Steel Braided Line, with Scale Recovery Hook Magnitic Angle Sensor / Voltage 4.8V - 8.4V Reefs Link Required for Programming Internal Steel Gears / CNC Aluminum Casing Specifications: Weight: 2.3ozDimension: 1.6 x .79 x 1.16 (LWH)Torque: 350oz @ 6v / 420oz @ 7.4v / 444oz @ 8.4vSpeed: .09sec @ 6v / .08sec @ 7.4v / .068sec @ 8.4vSpline: 25T WARNING: This product can expose you to chemicals, which are known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.