PACKAGE CONTENTS:- Battery Protection and low voltage indicator- Pre charging feature for faster trigger response- Programmable fire modes- Compact design Features: Adjustable 1-9 round burst. Programmable ROF of burst (0.005 sec intervals) Programmable for up to 3 consecutive 3-round bursts with one trigger pull Full auto burst delay (0.1 sec intervals) ROF adjustment MILSIM round counting functionality (semi auto, full auto, and burst) Magazine capacity setting 1~15 sec delay for magazine reset / “reload” LIPO low voltage cutoff Motor soft start Trigger switch arcing reduction Sniper mode delay (0.2 sec increments) Active braking Permanently stores user settings Piston pre-cocking function Adaptive smart reset-able fuse Supports voltages from 7.4v to 16v Micro switch safe Pre-charging feature for the motor