This is a replacement Traxxas Velineon VXL-6S Electronic Speed Control.

Few speed controls can match the VXL-6s™ ESC for raw, tire-shredding power. Whether tearing through the desert in the Unlimited Desert Racer® or maxing out the Sledge® on a 70+ mph speed run, the VXL-6s ESC pours on the power you demand for over-the-top fun. Power doesn’t need to be complicated and the VXL-6s offers the same user-friendly experience you get with all Traxxas speed controls. Just plug in the batteries, press the EZ-Set® button, and hold on!

Features:
Integrated telemetry for speed, RPM, voltage, and ESC temperature
Two-stage thermal shutdown protection with integrated cooling fan protects the VXL-6s from overheating
Bright multi-color LED status lights provide clear feedback
Built-in two-stage low voltage detection for Lithium Polymer (LiPo) battery use provides a clear signal to the driver that the batteries are nearing their minimum voltage threshold
Wide range of battery options from NiMH packs up to 6s LiPo power
The patented Training Mode™ is an exclusive Traxxas feature that reduces the overall power output of the VXL-6s by 50%, making it easier for inexperienced drivers to control their model. When you’re ready, simply change profiles to unleash full-throttle action
The EZ-Set® push-button setup operates and programs just like other Traxxas speed controls—eliminating the need to learn a new set of procedures
The VXL-6s is programmable with three drive profiles:
Sport Mode – Fwd / Brake / Rev
Race Mode – Fwd / Brake
Training Mode** – 50% Fwd / Brake / 50% Rev
Patented Traxxas High-Current Connectors eliminates a common bottleneck and maintain pure, unrestricted power flow from the batteries to the brushless power system
Locked Rotor Protection™ prevents system damage by cutting power if the vehicle is stuck or the motor is bound
Battery Over-Voltage Protection™ causes the ESC to go into failsafe mode if the maximum input voltage is exceeded
Water resistant case design uses rubber seals and O-rings to protect against damage caused by water and moisture
Gold plated 6.5 mm bullet connectors on ultra-efficient Maxx® Cable flow full power to the motor without performance strangling resistance

Specifications:
Input Voltage:
2x 2s/3s LiPo (Max 25.2 volts)
2x 7-cell/8-cell NiMH*
Case size: 2.23 in (58 mm) x 2.83in (72 mm) x 1.81in (46 mm)
Weight: 206.5 g (7.28 oz)
Motor connectors: Traxxas 6.5 mm bullet connectors
On resistance forward: 0.00075 ohms
On resistance reverse: 0.00075 ohms
BEC Voltage: 6.0 V
BEC continuous current: 10 A
BEC peak current: 20 A
Power wire: 10-gauge Maxx® Cable
Input harness wire: 26 gauge / 295 mm
Low voltage detection: 2-stage indicators, switchable (on or off)
Thermal protection: 2-stage thermal shutdown
Profile selection:
Sport Mode: 100% FWD, 100% BRAKES, 100% REV
Race Mode: 100% FWD, 100% BRAKES, NO REV
Training Mode:** 50% FWD, 100% BRAKES, 50% REV
Single-button setup: Traxxas EZ-Set®
Battery input connector : Traxxas High-Current Connector
Motor types : Brushless
Ports: RX input, auxiliary fan, Traxxas accessory port