This is the Tekin RSX Sensored Brushless ESC.

ESC Features:

• Optional Fan Shroud System and High Speed Fan for Maximum Cooling
• Compatible with Sensored/Sensorless Brushless and Brushed Motors
• Datalogging Capability
• EZ Access HotWire Programming Port
• D2: Dual Drive Mode Technology
• HDAC: High Density Copper PCB's
• Gold-plated Solder Posts for Easy Wire Replacement
• Pit Tune Mode
• QuickTune Programming
• One-Touch Radio Calibration High Voltage BEC (6.0v/7.4v)*
• Billet Aluminum Heatsink Housing
• Ultra-smooth and Precise Throttle and Braking Control
• Easily Access Programming, Anywhere, Anytime
• High Voltage Programmable BEC
• HotWire PC Interface for Advanced Programming and Updating
• On-Board Temperature Indicator
• Sensor Plug for Precise Commutation with all Motors
• Self Test Diagnostics and Factory Reset
• DGF2: Digital Glitch Filtering V2

Tekin’s RSX speed control defines versatility and capability, unlike any other electronic speed control that’s currently available on the market. The RSX takes 1/10th scale competition racing to a new level, thanks to its use of high-end components.

Control, power, and reliability are the foundation of Tekin’s RS-based ESCs. Armed with features, the RSX was designed for modified racing. Built with a custom high-efficiency aluminum heatsink housing and full on-board programming, the RSX provides the tools for the win! The aluminum housing and detachable fan shroud system maximize cooling for extreme racing conditions. The high-voltage BEC puts out the power you need for fast, precise steering servo operation. If you're looking for the ultimate ESC in modified racing, the RSX is there for the job. Capabilities such as datalogging and HotWire EZ Port communication allow you to unlock the full potential of the RSX with extensive tuning and datalog feedback.