the color of GDW BLS892 is changed into Black Description: Operating Speed: 0.12sec/60@6.0 V Operating Speed: 0.10sec/60@7.4 V Operating Speed: 0.08sec/60@8.4 V Stall Torque: 26 Kg.cm@8.4 V Stall Torque: 23 Kg.cm@7.4 V Stall Torque: 20 Kg.cm@6.0 V Operating Voltage: 4.8V-8.4 V Operating signal: 1520us / 333 Hz Motor type: Brushless Usage: for RC 550-700 Class Helicopter Package included:1x GDW Servo