Number of Nicad Cells: 6 to 8. 
Number of Lithium Cores: 2 to 3.
Maximum Continuous MA: 500MA.
Battery Eliminator Circuit: 750 MA.
Weight Without Wires: 2g.
Weight With Wires: 8g.
Designed for the Firefly Coreless motor. The Firefly speed control is specially designed for the 13:40 Firefly Coreless motor. Coreless Motors have almos no inductance in the armature winding and will not work properly with most model airplane speed controls. These motors really need a smooth non pulsating voltage source to work properly.
The New Astro Firefly control provides a smooth variable dc voltage to the motor. The control uses a digital micro processor to control motor speed and includes a Battery Eliminator Circuit so that a separate receiver nicad is not needed. The control has current sensing circuit that limits the maximum motor current to 500 ma even if the motor is stalled.
One 4410 MOSFET
The 4410 mosfet used in the motor drive circuit has a resistance 12 milliohms. This low resistance lets the control run cool and gives the Firefly control a continuous current rating of 500ma.

AST200