Made from a leather strap that binds a small magical tome to your wrists. 
It resonates with blue-ish magic, vibrating from within the pages.

While you are wearing this bracelet, you can use it as an arcane focus. In addition, you can attempt to cast a cantrip that you do not know. The cantrip you choose must be on the wizards spell list and you must provide the spell's components. Before resolving the spell you must make an Intelligence (Arcana) check. The DC is 12. On a successful check, you cast the spell as normal, using your spell save DC and spellcasting ability modifier. On a failed check, you cast a different cantrip from the one you intended. Roll a d20. The DM determines the resulting cantrip.