4pcs 20A Brushless ESC Electric Speed Controller with 3A BEC for RC 300 330 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 SBEC， load power is big， small power consumption with servo.
Multiple protection， overvoltage and overheating， loss of gas.
Compatible with all remote control Settings 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
Plug Size: 3.5mm
Package Size: 12 * 5 * 2cm / 4.8 * 2 * 0.8in
Package Weight: 148g / 5.2oz

Package list:
4 * 20A Brushless ESC