The 2-X10 XPSS (WS14A) 3 Way Slave Switch is a smart home accessory designed by X-10 specifically for use with X10/Domia 10 technology. This switch allows users to control over three separate devices using a single input, making it a convenient and efficient addition to any smart home system. Compatible with various X10 products such as WS12A/XPD3/WS13A/XPS3/XPS4/XPDI3/WS477, this switch provides a seamless and versatile solution for enhancing home automation.