The Dosy SW-4 selector switch offers a low insertion loss. It is backed by the Dosy professional architecture. This switch can handle up to 1,000 watts and has a printed circuit board. Matched with automatic SWR compensation, this vertical/horizontal/auxillary/vertical & horizontal switch is unmatched by anything in the industry! Low Insertion Loss Handles up to 1000 Watts Dosy Professional Architecture Printed Circuit Board Automatic SWR Compensation Vertical/Horizontal/Auxiliary/Horizontal + Vertical Positions