This is the Traxxas XL-5 Brushed Electronic Speed Control made by Traxxas. This speed control is packed with features and will allow you to run a 4-7 cell NiMh battery or 2S LiPo by adjusting between LiPo Safe Mode and Standard Mode.
Key Features
Built-in two-stage low voltage detection (LVD) for Lithium Polymer (LiPo) battery use
Innovative watersealed design
15-turn motor limit for 540 size motors
12-turn motor limit for 550 size motors
Fully-proportional forward, reverse, and braking control