INCLUDES:
One GV-1 control amplifier with LCD display
One sensor unit
Three mounting brackets,1- 30-size, 1- 50 size and 1- 60-size
One small plastic screwdriver for adjusting the unit
Two small magnets, (one used as a counter-balance for the fan)

SPECS:
Control resolution: .1 Hertz
Accuracy: 1%
Control response: 20mS (milliseconds)
Control range: 1000-2100 rpm (rotor head speed)
Mixture curve: 9 different points to set
Operating voltage: DC 3.8-6V
Current drain: 40mA at 4.8V

COMMENTS:
YOU MUST ENTER THE GEAR RATIO OF YOUR HELI INTO THE AMP, IF IT ISN'T IN THE MANUAL, DIVIDE THE NUMBER OF TEETH ON THE MAIN GEAR BY THE PINION TEETH.
Nexus standard and deluxe: 9.8 : 1 (also Concept 30s)
Nexus 46: 9.5 : 1
Legato: 7.8 : 1
Kinetic 50 9.1:1
Concept 60 and SR: 9.3 : 1
Sensor 7.5 x 10 x 16mm
Control amp 56.5 x 30.5 x 16mm
Weight is 38 grams
This device maintains a constant rotor head speed by monitoring the cooling fan speed and adjusting the throttle.