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https://www.amazon.com/HOBBYMATE-BLHeli-15A-ESC-Speed-Controller-180-210-250-Racing-RC-Quadcopter-Multicopter-TARGETHOBBY/dp/B01JOB2RII/ref=sr_1_1?ie=UTF8&qid=1479522647&sr=8-1&keywords=Quadcopter+esc