Perun AB is a microcontroller-steered mosfet device with active brake
and Li-Po protection which can be turned on or off. It is very rugged
and powerful, yet compact. Microcontroller guarantees resistance to
contact bouncing. Active brake (AB) prevents spring wear and double
shots in semi mode in replicas with high rate of fire. Li-Po protection
uses sound signals to let you know, that your Li-Po baterry is running
low and you should replace it.
The manufacturer does not specify maximum muzzle energy or rate of fire for replicas it
can be used with, as it can withstand any AEG configuration.
Operating voltage - 7V to 17V.
Dimensions - 20x13x7mm
Doenload Manuel here: http://perunairsoft.pl/ab_manual.pdf