First use
![](oxy_ex-2/common/tellus_6/graphics/0011A.png)
- Connect the supplied power adapter between the device (13) and the power supply. The battery charge indicator (5) will light up and remain amber while charging. As soon as the battery is fully charged, the battery charge indicator changes to green.
- Start up the device. Press the on/off button (7). During the device startup the on/off indicator (4) will light briefly at one second intervals. Once the device has started up and is ready for use, the on/off indicator will stay on.