Specification:
Use authentic electronic components to ensure high quality and enhance the current  endurance ability of the ESC.
Based on BLHeli firmware, optimized for high performance with great linearity and much quicker throttle response.
Special designed for multirotors, and compatible with fixed-wing aircrafts and helicopters.
Rotation direction of the motor is programmable: normal, reverse or bidirectional.
All parameters can be programmed via using a program card or a transmitter,  including default settings.
Multiple protection features including Low-voltage cut-off protection / over-heat protection / throttle signal loss protection.
Alarm to help you find the devices: keep the throttle on FULL OFF position for a while, the ESC will beep.
Throttle range can be configured and is fully compatible with all receivers, providing smooth, linear and precise throttle response.

Specifications:
Brand Name: Emax
Item: BLHeli-30A-OPTO
Continuous Current: 30A
Burst current(10S): 40A
Li-xx Battery(cell): 2-6S
Dimension 67x26x10 mm
Weight (wires Included): 25g
BEC Output: No BEC
Programmable: YES

Package Includes:
EMAX Blheli 30A OPTO ESC x4