Here is another crypto hardware wallet that helps you store your assets securely. The Prokey Optimum has a compact design and works with Windows, Linux, macOS, and Android. It lets you store Bitcoin, Ethereum, Ripple, Litecoin, and ERC-20 tokens.
More gadgets like this: here
Prokey Optimum is based on an open source project. It has a STM32F205RG chip with RNG. This wallet measures 50mm x 41mm x 9.4mm and has a web interface for easy management. You can find out more about it here.
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