This item is no longer for sale, it has been replaced with EMAX 9g ES08A High Sensitive Mini Servo.TowerPro SG90 is a high quality,low-cost servo for all your mechatronic needs. It comes with a 3-pin power ,control cable and motunting hardware.Features: 3 pole ferrite, all nylon gearTop ball bearingOperating Voltage: 4.8V~6.0VOperating speed: 0.12sec/60 degreeOutput torque: 1.6kg/cm 4.8VDimension: 21.5 x 11.8 x 22.7mmWeight: 9g