Speakercraft SL-One Speaker Level A-B Switch Speakercraft SL-One Speaker Level A-B Switch dual relays to handle music power levels up to 100 Watts per channel. PS-1.0 Power Supply Included Dual relays handle music power levels up to 100 Watts per channel Octal switch provides precision delays from 0.5 seconds to 5 minutes to handle virtually any music energy interval without false switching Sense Level permits adjustment to accommodate a wide range of music level conditions for best switching threshold B Status 3.5mm output jack triggers local devices (i.e. lighting, etc.) where desired Isolated ground paths permit use of BTL amplifiers Dimensions : L 4 5/8" x W 3 7/16" x H 15/16" View Manual Normally ships in 0-3 business days.