MuteCard protects your payment cards and passports.
Put the card holder on the back of your mobile phone. Put the MuteCard in the back pocket and the payment card in the front. When you need to use the payment card, take it out of your pocket and use it as usual.
You can also place the MuteCard close to the payment cards in the wallets.
Put the passport in the cover and put MuteCard in your pocket. When you need to use the passport, simply open it.