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