This is the Traxxas TRX-4m Brushless Power System

TRX-4m
Brushless Power System
The TRX-4M Brushless Power System gives you up to 50% more speed and more crawling torque and precision than brushed power systems. Rip wheelies in your monster truck or navigate a technical crawling course in your custom High Trail rig. The new TRX-4M Brushless Power System gives you the best of both worlds!

Features

• Field-Oriented Control (FOC) for superior low speed torque
• High-power 3350 Kv brushless outrunner motor
• Brushless ECM compatible with 2s TRX-4M iD LiPo batteries
• Retains all standard ECM features including Pro Scale lighting controls
• Integrated 3-channel receiver works with Traxxas TQ and TQi transmitters

Brushless Outrunner Motor

• 3350 Kv
• Field-Oriented Control (FOC)
• Laser-etched motor can
• Includes 11-tooth brass pinion gear
• High-torque output

Brushless ECM

• Compatible with TQ and TQi transmitters
• Use with 2s TRX-4M iD LiPo batteries
• True plug-and-play compatibility
• Two servo output channels
• Two Pro Scale lighting ports
• Three drive modes:
  
  • Sport (Fwd/Rev/Brake trail running)
  • Trail (light trail braking)
  • Crawl (hill hold)

Easy Installation
The TRX-4M Brushless System uses the same mounting points as the standard system for quick and easy installation—no modifications required!