DYS XS20A ESC has all the performance you would hope for. It supports Oneshot125， Oneshot42， Multishot and Damped Light. This ESC allows faster communication protocol between the FC and ESC on your quadcopter. It is perfect for 2204 brushless motor in QAV250. This ESC do not have a BEC， you will need to supply 5v power to your flight controller with a UBEC.<br /><img alt="" src="//agdetail.image-gmkt.com/950/298/829298950/img/www.guphotos.com/images/uploads/RM7144-1.jpg" style="width: 800px; height: 800px;" /><br /><img alt="" src="//www.guphotos.com/images/uploads/RM7144-3.jpg" style="width: 800px; height: 800px;" /><br />Features:<br />Default damped light for better multicopter control<br />High-current burst rating and High-Resolution throttle steps<br />Firmware upgradable via signal wire (works with USB Linker for XM series)<br />Supports motors with super high KV (EFM8BusyBee 50MHz can handle up to 500k eRPM)<br />BLHeli_S ESC with hardware generated PWM synchronous to MCU yields ultra-quiet motor performance<br />Supports 1-2ms signal， Oneshot125， Oneshot42 and Multishot， faster communication protocol between the FC and ESC on your quadcopter<br /><br />Specifications:<br />Brand: DYS<br />Item name: XS20A<br />MCU: EFM8BB21<br />Quantity: 4pcs<br />Constant current: 20A<br />Peak current: 30A (10S)<br />Power supply: 3-4s LiPo battery<br />BEC: NO<br />Type: BLHeli Bootloader &amp; BLHeli_S Firmware<br />Size: 24 * 14 * 4.5mm<br />Weight: 5g/pcs<br /><br />Package Information:<br />Package size: 7 * 4.5 * 4cm / 2.7 * 1.8 * 1.6in<br />Package weight: 40g / 1.4oz<br />Adhesive tape package<br /><br />Package List:<br />4 * DYS XS20A ESC<br><img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/4/RM7144/RM7144-1-becb-O28E.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/4/RM7144/RM7144-1-becb-4OFK.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/4/RM7144/RM7144-1-becb-CYOq.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/4/RM7144/RM7144-1-becb-AxK2.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/4/RM7144/RM7144-1-becb-0H0v.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/4/RM7144/RM7144-1-becb-SpbC.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/4/RM7144/RM7144-1-becb-lJjq.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/4/RM7144/RM7144-1-becb-Fz34.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/4/RM7144/RM7144-1-becb-jfKn.jpg" /><br>$$<img src="//img.tomtop.com/product/xy/2000/2000/p/gu1/R/4/RM7144/RM7144-1-becb-ITFj.jpg" /><br>