JR Propo S3411 2K Mini Servo. Replaced by S3422 2K.

Same as S3411 but with 2K FW.

For General use in RC air planes

Torque: 5.9 (6.6V) / 6.6 (7.4V)) / 7.5 (8.4V) kg･cm
Speed: 0.18 (6.0V)/0.16 (7.4V))/0.14 (8.4V) Sec/60°
Dimension: 26.5mm x 15.0mm x 33mm
Weight: 30g
Length of lead harness: 300mm
Operating Voltage: 4.5V - 8.5V
Wide Voltage
Double ball bearings
Programmable

The firmware in a 2K servo verifies the position of the servo arm two thousand times each second, 
while the firmware found in previous servos verify the arm's position one thousand times per second.
This greater number of verifications makes for a very precise servo, and gives it a more "solid" feel.

It is recommended to use a booster cable with 2K servos to ensure steady voltage at all times.