This premium Game Caller from Western Rivers operates a single 4″ reflex horn driver for a maximum 120db. Two external jacks can accommodate secondary amplified speaker(s) for virtual surround functionality. Auxiliary output to trigger motorized decoy (sync), in addition to motor sync connector. Sequential call playback to select speakers (when using auxiliary speakers)Remote with backlit push buttons give you complete control of call functions and can transmits up to 300 yards. Sound overlay, allows two sounds to play simultaneously, Configurable preset volume levels for different calls.