This is a set of 20A Mini SimonK ESC OPTO PWM 2 - 4S for QAV250 Quadcopter

Features:
100% brand new and high quality.
20A ESC Brushless Speed Controller for Multirotor Quadcopter.

Specifications:
Voltage: 6-16.8V (2-4S LiPo)
Output current: 20A
BEC: No
Signal frequency: 20-499Hz
Output PWM frequency: 18KHz
Firmware: simonk firmware
Weight: 8g (with wires)
Size: 45 * 18 * 10mm (without wires)
Color: transparent

Package Information:
Package size: 13 * 9 * 2.5cm / 5.1 * 3.6 * 1in
Package weight: 44g / 1.55oz
Adhesive tape package

Package List:
4 * Mini 20A ESC