Description 20A multi-aircraft electronic speed controller (ESC) Special core program for multi-rotor controllers Supports a signal frequency of up to 621 Hz Twisted-pair design throttle signal cable The T-Motor 20A AIR Multirotor ESC is compatible with various flight-control systems and supports a signal frequency of up to 621 Hz. View more Dimensions Size 52.4 x 21.5 x 7 mm (L x W x H) Weight: 14g Links PDF File