It would be very helpful for WEMO to develop 3-way switches that can be used to control a single light from multiple locations. I am surprised that WEMO does not already have this type of switch in its offerings. The lack of 3- and 4-way light switches forces users including myself to other manufacturers. Leviton has this functionality in their wifi capable switches. Their switch can have up to 4 additional locations besides the main switch. The other 4 locations require companion switches that are only about $27.95 each with the main 3-way costing about $45.00. Please develop this if you are not already doing so. If need be, purchase the Leviton Model DW15S-1BZ main switch and the DD0SR-DLZ companion switch and reverse engineer your own.