SW-S1 SPEAKER LEVEL AUDIO AB SWITCH MCLELLAND SW-S1Features Automatically switches the signal to stereo speakersbetween two power amplifiers. Dual Relays handle music power Levels up to 150 Watts. Delay Switch allows setting the Delay time from 0. 5 Seconds to 2 Minutes to change the music automatically. Sense Level allows the adjustment of sensitivity to the desired Threshold. A B Status LED indicate the music plays from Input A or Input B. B Status 3. 5mm Output Jack provides 12VDC Trigger to local