RacerStar 4-in-1 20A Brushless ESC 2-4S for Quadcopter Racing Drone;

Specifications:
Brand Name: Racerstar
Item Name: 20A 4 in 1 Blheli_S Opto 2-4S ESC
Model: RS20Ax4
Input Voltage: 2-4S
Con.Current:20A
Peak Current(10s):25A
BEC:NO
Programming :YES
Installing Distance: 30mm
Weight:19g
Size(PCB):36x36mm

Features:
-with Blheli_S firmware
-4 in 1 ESC, more easier to install
-with 24MHz BB1 Clip
-Support oneshot42 multishot, Dshot150 and Dshot300
-Small size and light weight
-Improved robustness to very high input signal rates
-Beeps can be turned off by programming beep strength to 1
-Throttle cal diffirence is checked to be above required minimum before storing
-Throttle cal max is not stored untill successful min throttle cal.

Package Includes:
1x RS20Ax4 20A 4 in 1 ESC
1x Mounting Screws
1x Standoff Kit