The LittleBee is a super compact, lightweight, high performance speed controller for your racing multi-rotor. Pre-flashed with BL-Heli_S.

These ESCs do not have a BEC, you will need to supply 5v power to your flight controller with a UBEC or stepdown voltage regulator. 

These new Littlebee 20A-S esc's have there own dedicated Driver Chip with the blheli_S compatable bootloader

• BEC: none
• Current: 20A
• Burst Current: 25A
• Bootloader: BL-Heli_S
• Size: 23.5mm x 12mm
• Support/Mode: Oneshot125, Oneshot42 and Multishot
• Main IC: SILABS EFM8BB21F16, MCU runs at 48MHz
• Battery: 2-4S LiPo
• MOS: Both low and high side fets are Nfets
• Weight: 4g (including Power and signal wires)

With all ESC's that have active braking we recommend you isolate or filter all sensitive electronics to prevent feedback / spikes.