Item No KO_40043 The further evolution of the VFS-1 has accomplished the changeable frequency systems. This is a high performance model with a backbone of the successful functions of the VFS Series.The frequency setting width is 0.46KHz-5.26KHz. 64 different frequency settings can be set in each setup across the 32 steps of the throttle. This is a forward and reverse esc. The reverse function can be turned off to make the esc a forward only or you can turn off the brake function to go straight into reverse.