The XRotor Pro series of ESCs from Hobbywing have been optimized for multi-rotor use.

With their special core program for multi-rotor greatly improved throttle response and software specially engineered for
Compatibility with disc type outrunner motors they offer unsurpassed smoothness and control.

All settings except the timing are pre-set, making using the XRotor Pro series very simple and versatile.
Crosstalk from the extra-long signal wires is effectively reduced by twisting the wires instead of laying them parallel which again, helps to simplify installation and improve the flight characteristics of your multi-rotor.
Most flight controllers are compatible with the XRotor Pro series which supports signal frequencies of up to 621Hz (anything over 500Hz is non-standard.)
The high performance of the drive chip is enhanced further by the use of extra low-resistance MOSFETs that also allow high currents to be held stable for longer.

A unique feature of the series is the Driving Efficiency Optimization (DEO) function. This significantly improves throttle linearity and driving efficiency by automatically braking and quickly reducing the motor speed when decreasing the throttle amount. This can improve the manoeuvrability and stability of your multi-rotor and improves the efficiency of the ESC as well as reducing its operating temperature.

Super-bright, inbuilt LEDs save you the trouble of installing additional components into your model and are switchable between red and green via the control panel on the front of the ESC.
This control panel also gives you control over motor direction (CW/CCW) and DEO function (on/off.)

Features:
• Super-efficient ESC
• Driving Efficiency Optimization function
• Integral LEDs
• Long leads for simple installation
• Programmable items: LED status, LED color, DEO function & motor rotation

Specs:
Constant current: 50A
Burst Current: 70A (10 seconds)
BEC Mode: No BEC (OPTO)
Lipo Cells: 4~6S (12.8~22.6V)
Power lead length: 380mm
Signal lead length: 520mm
Motor lead length: 75mm
Size: 48 x 30 x 16mm
Weight: 56g

Included:
Hobbywing XRotor Pro 50A Dual OPTO Muti-rotor ESC
Cable tie
Heatshrink tube
Manual