Your Bitcoin, Ethereum, and other digital currencies require at least a digital wallet, so recording the digital currency mnemonic is a must. BTCDOVE brand titanium alloy mnemonic boards and engraving pens provide a superior solution. With an elegant appearance and a size comparable to a credit card, these products are crafted from pure titanium. They exhibit greater resistance to high temperatures and corrosion than stainless steel, remaining rust-free even after prolonged immersion in seawater, and they are easy to write on.