Today, Sonoff only provides the 1 Gang model in Single Wire technology.
I am sure that a lot of people would be interested in 2 Gangs and 3 Gangs solution. I have personally re-fitted my entire flat with 2 Gangs and 3 Gangs switches , Single Wire, but they are not reliable (they very often forget to operate correctly and the only solution it to switch off the entire house (lighting) to reset the Single Wire Switches.
I am convinced that Sonoff could design 2 and 3 Gangs single wire switches and supply the market with a reliable solution.
I have been a user of Sonoff products (Basic, RF Bridge, Bulbs,...) for more nearly 3 years and everything has always worked perfectly.
Thank you in advance