This is the Viper R/C "Copperhead" Sensorless Brushless ESC. The Copperhead Speed Control comes preloaded with 6 set profiles, and includes high capacity 3.5mm bullet connectors for easy motor installation, as well as removal for cleaning and maintenance. Easily select the profile for your driving conditions, from high speed to just learning. Additionally, ProGauge (sold separately) programmability allows easy editing of the speed controls parameters.

Specifications:
Continuous/Burst Current: 100A/550A
BEC Output: 6V/5A Linear
ON Resistance: 0.0009Ω * 2
Motor Type: Sensorless Brushless Motors
Motor Spec: 2S Li-Po w/540 class: KV ≤ 6000 & 3S Li-Po w/ 540 class: KV ≤ 4000
Vehicle Weight: ≤6 lb
Motor Connection: 3.5mm Bullets
Dimensions: 45.5x39.8x29.25mm
Weight (with battery wires and connector): 96g