4PcsFavourite 30A 2~6S LiPo Battery OPTO ESC Brushless Speed Controller for F450/550 Quadcopter Multicopter<br><br><br>Features:<br>Can be programmed by program card or transmitter.<br>All firmware and components are from renowned makers.<br>Throttle range setting and multiple accelaration start up choices.<br>Based on BLHELI firmware, futher optimized to the perfect flying performance.<br>Controller ESC with BLHELI Program for DIY RC F450 F550 Quadcopter Multicopter.<br><br>Specification:<br>Constant Current: 30A<br>Burst Current: 35A up to 10S<br>Input Volt: 2S-6S LiPo battery<br>BEC Output: No<br>Firm Ware: BLHELI<br>Main IC: SILABS C8051F394<br>Support Damped mode<br>Item size: 35 * 17 * 6mm (Without cable)<br>Item weight: 10g / Pcs<br><br>Package Information:<br>Package size: 13 * 10 * 2cm / 5.1 * 3.9 * 0.9in<br>Package weight: 42g / 1.5oz<br>Adhesive tape package<br><br>Package List:<br>4 * Favourite 30A ESC