YOD55G Brand: PowerHD. Model: 2216MG. Metal gears for high torque performance. Speed: 0.13sec/60° at 6.0V. Torque: 3.9kg-cm at 6.0V. Storage temperature: -20°C~60°C. Operating temperature: -10°C~50°C. Operating voltage: 4.5V~6.0V. Dimensions: 22.8*12*29.4mm. Weight: 15.8g.   Package Details Weight: 25.68 g Size: 6*5*3 cm Package Includes 1 × Digital Servo 1 × Set of Accessories