Samsung BHS3000 - Manual (Page 8)

6
Charging the headset
The headset has a rechargeable internal battery which is non-removable.
Make sure the headset is fully charged before using it for the first time.
To check the battery level, see page 7.
1 Connect the charger to the multifunction jack (see below images).
2 Plug the charger in to the wall outlet. During charging, the indicator light will
turn red. If charging does not begin, unplug the travel adapter and plug it in
again.
3 When the headset is fully charged, the red indicator light changes to blue.
Unplug the travel adapter from the wall outlet and the headset.