Soundcast SCS120 2x Wireless Speaker Connection System (Discontinued by Manufacturer) 1X features one amplified receiver module with 30W/ch of digital power and one wireless transmitter 2X features two amplified receiver modules with 50W/ch of digital power and one wireless transmitter Speaker trim-level adjustments Interference-Free system - not affected by microwave ovens, cordless phones or other wireless devices Fixed latency (20 ms) for same-room use