While wearing this circlet, you can use an action to cast the scorching ray spell with it. When you make the spell’s attacks, you do so with an attack bonus of +5. The circlet can’t be used this way again until the next dawn.
RollQuest ships the D&D 2014 SRD as a content pack, on a 5e character sheet that does the maths - roll from the sheet and let the numbers work themselves out. Free to start.