ZTW Spider Series 20A 2-6S 600 Mhz OPTO Brushless Speed Control ESC SimonK 2013.5

ZTW Spider OPTO ESC are quality speed controllers and designed for simple installation and easy setup these ESCs have proven to offer excellent performance in Multi-rotor applications. If your starting out in Multi-rotors and need an easy to install solution that is tested and proven to work with Multi-rotor craft then these speed controllers have you covered. Aslo we have wide range of products in this product line. 
These ESC's features a very smooth yet linear throttle response, without sacrificing a rapid, crisp, response to any throttle input. Super fast Refresh Rate up to 600Hz make these a very smooth controller. That is to say support PWM input rates up to 600Hz for great response on your quad-copter. Fashion design and high quality with best performance but sells at very reasonable price.
 
Features:
 
Extremely low internal resistance
Super smooth and accurate throttle linearity
Safety thermal over-load protection
Auto throttle shut down in signal lose situation
Supports high RPM motors
Power arming protection (prevents the motor from accidentally running when switched ON)

Use new generation of the MOSFETs to make sure the ESC with low heating and more reliability