The DYS XM20A ESC's are a BLHeli 10 amp capable electronic speed controller. These are designed to operate high KV motors and likely to be used on a smaller sized quadcopter as they only support up to 3 cell LiPo batteries. The specs are similar to the other XM series ESCs. Compatible with all modern flight controllers including boards running F3 chips they are designed for quick throttle response. Features OneShot125 with 3000Hz refresh rate. Also programmable via USB and supports reversing of brushless motors and 3D modes. Motor direction is reversed by switching two wires when connecting the motor to the ESC.