DIGOU 5 pcs TowerPro SG90 9G micro small servo motor RC Robot Helicopter for Helicopter Airplane Boat Controls Operating speed: 0.12second/ 60degree ( 4.8V no load) Stall Torque (4.8V): 17.5oz /in (1kg/cm) Operating voltage: 3.0V~7.2V Temperature range: -30 to +60 Dead band width: 7usec