These boots have 4 charges and regain 1d4 expended charges daily at dawn. While wearing the boots, you can take a Magic action to expend 1 charge, gaining a Fly Speed of 30 feet for 1 hour. If you are flying when the duration expires, you descend at a rate of 30 feet per round until you land.
RollQuest summary 4 charges; regains 1d4 at dawn. Magic action, 1 charge: Fly Speed 30 ft for 1 hour; if flying when it expires, descend 30 ft per round.
RollQuest ships the D&D 2024 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.