ZTW Spider OPTO ESCs 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 you're 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. Also we have wide range of products in this product line. These ESCs 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.

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