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DYS 50A Opto, Simonk firmware, Best For Professional MulticoptersDescription:DYS ESCs are one of the most popular muli-rotor ESCs in the market today. They are high quality electronic speed controllers designed for simple installation and easy setup. DYS OPTO ESC are quality speed controllers a..

NEM 40A Opto, Heavy Duty ESC, Simonk firmware, Best For Professional MulticoptersDescription:NEM ESCs are one of the most popular muli-rotor ESCs in the market today. They are high quality electronic speed controllers designed for simple installation and easy setup. NEM OPTO ESC are quality spe..