The SG90 has 3 wire interfaces in which the connections should be made as follows: Red wire-5V, Brown Wire-Ground, Yellow wire-digital pin 9.
Operating speed: 0.12second/ 60degree ( 4.8V no load) ; 0.10 seconds / 60 degrees (6.0 V)
Stall Torque (4.8V): 17.5oz /in (1kg/cm)
Operating voltage: 3.0V~ 6V
Temperature range: -30 to +60
Dead band width: 7usec
No Load Running Speed: 0.09±0.01 sec/60° at 4.8V Rotary Angle: 180°

9G micro servo motor for rc robot, robot arm, helicopter airplane, car, boat remote controls experiments.

Package Include:
5 X SG90 servo motor
5 X servo arms and screws kit