4 PCS Racerstar RS30A V2 30A  BB2 48MHz Blheli_S  ESC  OPTO 2-4S Support Oneshot42 Multishot for FPV Racer Specification: (Manual)Brand Name: RacerstarItem Name:New Beheli_S 30A ESCModel: RS30A V2Input Voltage: 2-4SCon.Current:30APeak Current(10s):35ABEC:NOProgramming :YESNet Weight: 6.26gSize:28*13mmFeatures:- Chips on EFM8BB21F16、 48MHZ Greatest .- BLHeli_S is designed for superior performance in multirotors、 and uses hardware generated motor pwm for smooth throttle response and silent operation.- Small size combined with light weight for easy installation. - The code supports regular 1-2ms pulse width input、 as well as Oneshot125 (125-250us)、 Oneshot42 (41.7-83.3us) and Multishot (5-25us).- The input signal is automatically detected by the ESC upon power up.- All codes use damped light mode.Damped light does regenerative braking、 causing very fast motor retardation、 and inherently also does active freewheeling- The code supports features to prevent sync loss. There are tuneable parameters that can make the code run well even in the most demanding situations、 although default settings will work- excellently in normal operating environments- The code also supports a beacon functionality、 where the ESC will start beeping after a given time of zero throttle. This can be very useful for finding lost crafts.Package Included:4x Racerstar RS30A V2 New 30A ESC