When the light bar flashes orange, Embr Wave is trying to tell you that it's running low on battery.
To recharge it, plug the included micro USB cable into the underside of the device . You will see a green light pattern when Embr Wave is charging.
When Embr Wave is done charging, the green light will stop pulsing and stay on.
Although the instructions say that a full charge is signified by the green light turning off, we recently made a firmware update based on early customer feedback so that the solid green light now indicates that your Embr Wave is fully charged!