Features:1. Metal output teeth, double bearings, tough & wear-resistant.technical parameter: Working voltage: DC4.8-8.4 V Output torque: 15 Kg.cm. Output speed: 0.2s / 60 ° Output torque: 19kg / cm Output speed: 0.17s / 60 ° Output torque: 22 Kg. com Output speed: 0.14s / 60 ° Working frequency: 1520us / 333HZMotor type: carbon brush motor Package Included:1*GDW DS620MG Servo