GoolRC 12A Brushless Electronic Speed Controller ESC with 5V/2A Linear Mode BEC Simonk Software for H250 F330 Quadcopter Multicopter.
With built-in Simonk software， quicker throttle response and better throttle linear can even do some 3D flying with quadcopter.

Features:
High anti-interference capability
Quicker throttle response and better throttle linear
Based on SimonK firmware， optimized to the perfect 3D performance
Super high refresh rate， no buffering of the input signal， resulting in more than 490Hz response rate
Highest accuracy with Crystal Oscillator (Temperature won't affect the PWM operating range like other cheap ESC's)

Specifications:
PWM: 8 KHz
BEC: 5V/2A linear mode
Input Voltage: 3S LiPo battery
Constant Current: 12A
Burst Current: 14A/10sec
Frequency: 30HZ-499HZ
Max RPM: 240，000rpm for 2 Pole Brushless Motor

Package Information:
Package size: 10 * 6 *1cm / 4 * 2.4 * 0.4in
Package weight: 17g / 0.6oz
Adhesive taps package

Package List:
1 * 3S 12A Brushless ESC