This is a replacement Traxxas X-Maxx Velineon VXL-8s Waterproof ESC.

When you create the world’s most powerful Ready-To-Run® vehicles, off-the-shelf components just won’t do. Traxxas engineers started from scratch to create the ultimate Maxx®-Truck ESC to drive the thundering Big Block motor. Heavy-duty does not begin to describe the waterproof VXL-8s electronic speed control. This is Maxx-duty!

Features:
Internal temperature sensor with integrated cooling fan and two-stage thermal shutdown protection protect the VXL-8s from overheating
Bright multi-color LED status lights provide clear feedback
Built-in two-stage low voltage detection for Lithium Polymer (LiPo) batteries use provides a clear signal to the driver that the batteries are nearing their minimum voltage threshold
Wide range of LiPo battery options from 3s packs up to full-power 4s LiPo packs
The patented Training Mode™ is an exclusive Traxxas feature that reduces the overall power output of the VXL-8s 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-8s 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: 4s/6s/8s LiPo (max 33.6 volts)
Case size: 2.23 in (58 mm) x 2.83 in (72 mm) x 1.81 in (46 mm)
Weight: 215.5 g (7.60 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 / 100 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: Yes, Traxxas EZ-Set®
Battery input connector : Traxxas High-Current Connector
Motor types : Brushless
Ports: RX input, auxiliary fan, Traxxas accessory port