KopterMax 12 channel motor cutoff and switch (compact version)Full receiver redundancy. Half the board space. The KopterMax A B Failover Switch Compact delivers the same proven 12 channel failover performance as the standard version in a smaller, lighter form factor built for weight sensitive and space constrained UAVs. The moment your primary receiver fails, all 12 channels switch to the backup in under 1 millisecond. Software defined per channel failsafe values give you precise control over every output.