Ever wanted PTW-like trigger response and gear timing without having to dish out thousands for such a feature? Ever wanted a reliable 3-burst function on an AEG? Well now you can have it! for just under 100 dollars the AIRSOFT SYSTEMS SMART CONTROL UNIT features all the functions you ever wanted. Most notably; 3 Round Burst! Full Cycle Timing! No Anti-reversal Latch! and Battery Deep Drain Protection.