This is the latest BB2 version

Details:

The Sunrise Cicada BLHELI-S Upgrade BLHeli 20A 2-4S Programming Multishot ESC for RC Quadcopter runs on BLHeli-S

firmware that is designed for superior performance in multirotors and uses hardware generated motor pwm for smooth throttle

response and silent operation. 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 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.

Features
Run on BLHeli-S firmware that is designed for superior performance in multirotors
Use hardware generated motor pwm for smooth throttle response and silent operation
All codes use damped light mode
Damped light does regenerative braking, causing very fast motor retardation, and inherently also does active freewheeling
Support features to prevent sync loss, with tuneable parameters that can make the code run well even in the most demanding situations
Support 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
Also support a beacon function for finding lost aircraft, the ESC will start beeping after a given time of zero throttle
Can be programmed on Multishot

Technical Specifications:

Continuous Current: 20A
Peak Current (10s): 25A
BEC: no
Lipo: 2s - 4s
Programming: Yes
Weight: 9.1g
Size: 28x 13mm