Please note this is a digital servo. Digital servos perform quite differently to standard servos which have analogue motor drive amplifiers.

Digital servos are driven by a digital amplifier which has a small microprocessor to generate the necessary drive current to the motor.
This drive current is switched at very high speed, hence this will be audible as a high frequency buzzing - this is not a fault at all, this is how they work. The audible noise is a result of the servos very tight centring ability, it will constantly hunt around the exact centre point minutely to enable best possible resolution.

All digital servos sound different from standard types and they tend to exhibit this type of high frequency switching noise. If you are unsure this is suitable for your needs buy an analogue servo.


E-Power 12gram Digital Metal Geared Micro Servo

Specifications.

Weight: 12g
Size : 23.5x11.5x24 mm
Voltage: 4.8-6v
Speed: 0.10 s/0.9s /60deg
Torque: 2.4kg/cm@6v
Dead Band Width: 1usec

Additional Measurements:

Length 23.5mm (main part of body i.e. length of cut out to fit it in) / 32mm including the mounting tabs
Width 11.5mm
Height: 20.1mm (main part of body) / 29.5mm (total height with an arm fitted)

Please Note: 6 volts really does mean 6 volts not 7+ as is likely with 5 fully charged 2nd generation NMH cells