This device is getting better with every release! For the people using @GetBittr or other exchanges that require proof or keys, signing of transactions has now become easy. The signing feature in general is interesting. Many people don’t use it yet, but signing for example with Sparrow ensure you have control over the specific address without sending a small portion of bitcoin to an address first. The thing many people still do. Verifying this without wasting bitcoin on chain with “message signing” is a much better way. 
nostr:npub15c88nc8d44gsp4658dnfu5fahswzzu8gaxm5lkuwjud068swdqfspxssvx do you have an explainer video on this? nostr:note1xycv9zrf8fs549un92p0dc8xlefjyacxrtfj4deqc2af70c4v6xs7csc2a