1， Compliant with most standard receiver connector: for Futaba， for Hitec， for Sanwa， for GWS etc2， Great for truck， boat， racing car and airplane3， Power Supply: Through External AdapterSpecification:Connector Wire Length 320mm Operating Speed : 0.19sec / 60 degrees (4.8V no load) 0.23sec / 60 degrees (6.0V no load)Stall torque: 3.2kg/cm(4.8V)，4.1kg/cm(6V)Operation Voltage : 3-7.2VGear Type: All Metal GearsColor: Black Size: 44 x 20 x 40mmPackage Includes:1 x Towerpro MG995 Metal Digital Servo(with Servo Arms， Screws)