SA HAL™ ETU V2 Processor Unit - Rear Wiring

HAL™ ETU V3 Processor Unit – sensitive switching, modern functions, longer lifespan

Looking for a way to significantly improve trigger response, increase the reliability of your AEG rifle and protect its internal components from unnecessary wear? Want a unit that safely switches the motor, offers active braking, supports pre-cocking, binary mode and can work with Li-Po batteries without risk of damage? Need a system that is easy to program yet highly customisable? Then the Specna Arms HAL™ ETU V3 is the ideal solution. Using the principles of the Hall effect, it reads trigger movement with exceptional precision, dramatically improving response and shot consistency. The unit provides enhanced protection against low voltage, overload and incorrect activation, and is fully compatible with brushless motors (e.g. Warhead or Specna Arms Dark Matter). The included trigger must be installed for proper operation.

Guide for using the HAL™ ETU unit

Key Features

• Trigger sensing via Hall effect:
  Maximum sensitivity, stability and zero mechanical wear thanks to magnetic sensing.
  
  
• Active brake:
  Instant motor stopping for better RoF and shot consistency.
  
  
• Binary trigger:
  Shot on pull and release – ideal for CQB.
  
  
• Adjustable trigger sensitivity:
  5 levels from 20 to 100%.
  
  
• Pre-cocking:
  6 levels for instant firing response.
  
  
• Programmable firing modes:
  SEMI (semi, binary, AUG, sniper), AUTO (auto, 3-burst, 5-burst).
  
  
• Easy programming:
  All settings configured directly via the trigger – no apps or cables.
  
  
• System protections:
  Low voltage, over-voltage, overload above 40 RPS, extended component life.
  
  
• Brushless motor compatibility:
  Fully prepared for modern BLDC motors.

Important Notice

• In AUTO mode the rifle fires a 3-round burst first, then switches to unlimited full-auto.
• The included updated trigger must be used for proper functionality.

Unit Activation After Installation

• Set the fire selector to SAFE.
• Connect the battery and wait for the first beep (approx. 3 s).
• Hold the trigger for 5 seconds until the second beep.
• The unit is now activated and ready to use.

Technical Specifications

• Designed for: Gearbox V3
• Wiring: Rear-wired
• Connector: T-Dean (male)
• Sensing method: Magnetic sensors (Hall effect)
• Weight: 24.5 g
• Trigger sensitivity: 5 levels (20–100%)
• Pre-cocking: 6 levels
• Firing modes: Semi/Binary/AUG/Sniper, Auto/3-burst/5-burst
• Protections: Low voltage, over-voltage, RPS limit 40+

Package Contents

• HAL™ ETU V3 processor unit
• HAL™ trigger
• Mounting sleeves and shims
• V3 selector plate
• Programming card