IB Digital Security Card+

Works fine for me but the buttons on it are probably not good for my grandmother, can carry around in my wallet like a credit card without damaging, battery seems to last ~5 years, adds a few seconds to the login process but only need to use it once a day on an iPhone or if you keep TWS open. Overall worth it if you value the ability to withdraw larger sums and/or want a higher security level.
 
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