Description:
The FS90R is an analog micro servo that is capable of continuous rotation clockwise or anti-clockwise, as opposed to moving to a set position.
The servo can be controlled using any servo code, hardware or library and to control with an Arduino, just connect the orange control wire to pin 9 or 10 and use the Servo library included with the Arduino IDE.
Good for beginners who want to make stuff move without having to use a motor controller, especially since it will fit in small places.
They may require some simple calibration, simply tell the servo to 'stop' and then gently adjust the potentiometer in the recessed hole with a small screwdriver until the servo stops moving.

Specification：
Dimensions:23.2 × 12.5 × 22 mm
Weight:9 g
Operating Speed : 110RPM (4.8V) 130RPM (6V)
Stall Torque : 1.3kg.cm/18.09oz.in(4.8V) 1.5kg.cm/20.86oz.in(6V)
Operating Voltage: 4.8V~6V
Control System: Analog
Direction: CCW
Operating Angle: 360degree
Required Pulse: 900us-2100us
Bearing Type: None
Gear Type: Plastic
Motor Type: Metal
Connector Wire Length: 20 cm
Document link http://www.diymalls.com/files/FZ0101-01-FS90R-Servo.pdf
Package Inlcuding:
5 X Feetech FS90R Servo