20A simonk firmware brushless ESC is specially designed to meet the demand of ever popular multi-rotors. And it has multiple protection features: Low-voltage protection， over-heat protection and throttle signal loss protection. With better quality and competitive price， it will be your best choice for multirotors.

Features:
Fast throttle response.
Extremely low internal resistance.
Specially designed for multicopter.
The maximum refresh frequency up to 500Hz throttle signal， compatible with most flight controls.
Multiple protection features: Low-voltage protection， over-heat protection and throttle signal loss protection.
Throttle signal is twisted pair cable， reduce the crosstalk while the signal transfer by the copper wire and flight more stable.

Specifications:
Output current: 20A
Burst current: 30A (10s)
Power supply: 6-16.8V (2-4S LiPo battery)
BEC: NO
Quantity: 4Pcs
Signal frequency: 20-499Hz
Output PWM frequency: 18KHz
Firmware: Simonk firmware
Item size: 37 * 14 * 5mm (without wire)
Item weight: 6g

Package Information:
Package size: 12.5 * 5 * 4cm / 4.9 * 2.0 * 1.6in
Package weight: 44g / 1.6oz
Adhesive tape package

Package List:
4 * 20A Brushless ESC