The MG996R is essentially an upgraded version of the famous MG995 servo, and features upgraded shock-proofing and a redesigned PCB and IC control system that make it much more accurate than its predecessor. The gearing and motor have also been upgraded to improve dead bandwidth and centering. The unit comes complete with 30cm wire and 3 pin type female header connector that fits most receivers, including futaba, JR, GWS, cirrus, blue bird, blue arrow, corona, berg, spectrum and hitec. This high-torque standard servo can rotate approximately 120 degrees (60 in each direction). You can use any servo code, hardware or library to control these servos, so its great for beginners who want to make stuff move without building a motor controller with feedback gear box, especially since it will fit in small places. The MG996R metal gear servo also comes with a selection of arms and hardware to get you set up nice and fastDimension: 40.7*19.7*42.9mm Stall Torque: 10kg/cm Operating Speed: 0.20sec/60degree(4.8v) Operating Voltage: 4.8-7.2V Temperature Range: 0°C - 55°C