Amazon.com: QWinOut 2-4S 30A RC Brushless ESC Simonk Firmware Electric Speed Controller with 5V 3A BEC with 3.5mm Female Banana Bullet for 2 to 4s Lipo Battery, DIY Multicopter Quadcopter (30A, 4
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Amazon.com: 4pcs 2-3S 12AMP 12A for Simon K SimonK firmware Brushless ESC with BEC Quad Multi APM for 180 210 250 290 Mini Quadcopter Multi Copter : Toys & Games
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