Baitaihem 4pcs Genuine Mini SG90 Micro 9g Servo Accessories For 450 RC Helicopter Airplane Car Boat 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