BulletHD Pro 1080P User Manual page 5

Battery 2 pcs
No need for AA batteries with your Bullet HD. Powered by a
rechargeable li-ion battery you'll get up to 60~90 minutes of
continuous recording totally.
Hand Safety Strap
Charger
USB Cable
Silicon Grease
Using BulletHD for Water Sports
Remind you to put some silicon grease to the rubber O-ring
from time to time, especially before using underwater. Make
sure the rear cap ③ was closed tight.