??20A(2-4S) brushless electric speed controller with 3A BEC for 300 330 RC quadcopter.

Features:
Using MCU processor， the user can set against their demand function.
Speed smooth feel， good linear speed regulation.
Support unlimited high speed and constant speed function brushless motor.
Startup mode can be set up， the throttle response speed.
Built-in BEC， load power is big， small power consumption with servo.
Multiple protection， overvoltage and overheating， loss of gas.
Compatible with all remote control ettings and support programming card set.

Specifications:
Constant Current: 20A
Burst Current: 25A
Battery: 2-4S Lipoly
BEC: 5V / 3A
ESC Size: 6 * 2.5 * 1cm
ESC Weight: 37g

Package information:
Package Size: 12 * 5 * 2cm / 4.8 * 2 * 0.8in
Package Weight: 148g / 5.2oz

Package list:
4 * 20A(2-4S) Brushless ESC