Aside from the required examination admission ticket, current valid international travel passport, approved calculator, and approved writing instruments, the CFA Institute states that you can also bring:

Manual pencil sharpeners
Erasers
Loose calculator batteries (and a screwdriver for battery replacement if needed)
Calculator cases and keystroke cards
Eyeglasses (but no eyeglasses cases)
Earplugs
Wristwatches with alarms and timers silenced (smartwatches are not allowed)

Finally, the following personal items are allowed in the examination room, but must be kept off your desk and in your pockets or under your chair when not in use:

Wallet/Coin purse
Medicine and other necessary medical items
Gum, hard candy, cough drops
Eyeglasses case
Keys

These items may not enter the examination room:

Backpacks, handbags, tote bags, clear plastic bags, pencil cases and any other form of baggage
Highlighters, correction tape or fluid, and rulers
Food and drinks
Study guides, textbooks, scrap paper (or paper of any kind)
Calculator manuals, present or future value tables, scratch paper, or any other academic materials
Any type of weapon
Electronic devices such as a cell phone, pager, computer, PDA, camera, etc.
Any desk clock or timer