Abstract: A warning device apparatus for monitoring an alarm status of a bearing that is mounted to a piece of rotating machinery is provided. The warning device includes a body portion, a top portion, a base portion, a power source for powering the device throughout a life of operation, a controller for controlling the operation of the warning device and at least one LED for displaying the alarm status. An operator inspects the warning device for an initial alarm indication by visually inspecting the at least one LED. The at least one LED is controlled to blink at a relatively quick initial rate and/or intensity that maximizes indicator visibility to the operator at initial indication. The at least one LED is controlled to blink at a slower/decreasing rate as time passes. Battery life of operation is extended by virtue of the slower/increased blink rate and conversely the increased pause time.