he 
Xcortech X3300W MK2 Chronograph & Tracer Unit
 is a comprehensive airsoft accessory system that combines a tracer unit with a built-in chronograph, a PEQ-style control unit, and a programmable MOSFET for advanced AEG control. The components communicate wirelessly, offering a range of functions including muzzle velocity measurement, rate of fire display, and programmable burst fire. 
Key Features and Specifications
Integrated System: The product comes as a set including a barrel-mounted tracer unit, a rail-mounted PEQ command box with a digital display, and a separate programmable burst unit (SCU/MOSFET) that installs in-line with the AEG's battery.
Wireless Communication: All units in the system communicate wirelessly, reducing clutter and simplifying installation.
Performance Measurement: The built-in sensors accurately measure muzzle velocity (in FPS/MPS) and rate of fire (ROF in RPM).
Tracer Function: The high-power UV LED tracer unit is designed for use with green glow-in-the-dark BBs, illuminating them for enhanced visual effects during use.
Programmable Controls: The PEQ command box allows users to program various settings, including a BB counter (countdown or total shots fired), low ammo warning, and adjustable burst fire (2-10 rounds per trigger pull or full auto).
Battery Monitoring: The system provides a real-time battery level indicator and a low battery warning for the AEG, which also protects the gun/battery from voltage drops.
Durable Construction: The tracer unit is made from high-quality aluminum with a 14mm counter-clockwise (CCW) thread for standard airsoft rifle compatibility, while the other components are made from durable polymer. 
Technical Details
Component 
Power Source (Batteries not included)
Dimensions (approx.)
Weight (approx.)
Tracer Unit
4 x AAA batteries
156mm (L) x 37mm (D)
140g
PEQ Control Box
2 x AA batteries
110mm x 70mm x 31mm
70g