Feature 

High Performance Standard Digital Servo

High Voltage Capatible

High Precision Metal Gears

Long Lifespan Brushless Motor

High Strength Three Ball Bearings

Full CNC Aluminium Structure

Ideal for 450-800Class RC Helicopters

Here is the flight test on SAB Kraken 580: https://www.youtube.com/watch?v=UmLl7GuthPQ

Specification

A80BHM-H

Operating Voltage: 4.8-8.4 V

Operating speed: 0.120sec/60° @ 6.0V

Operating speed: 0.100sec/60° @ 7.4V 

Operating speed: 0.085sec/60° @ 8.4V 

Stall Torque: 29 kg-cm (403 oz-in) @ 6.0V

Stall Torque: 34 kg-cm (473 oz-in) @ 7.4V

Stall Torque: 38 kg-cm (528 oz-in) @ 8.4V 

Gear: Steel

Motor: BLS

Size: 40*20*37.2mm (1.57 x 0.78 x 1.46 in)

Weight: 79g

Connector Wire: TYU 300 mm