This grounded type L plug adapter with two outlets could be used in Switzerland.
The 2-in-1 feature is a excellent way to share the outlet. It's very a very favorable feature when there's just one outlet.
The adapter accept a wide variety of two and three prong plugs ,suitable for Switzerland.
Please Note that your Device need to support 100-240V in order to use with this adapter when you traveling overseas.
This is plug adapter, NOT voltage converter.