The light on the Micro+ will flash between green and red if there is any issue in communication between battery and tank attached. This can be resolved by ensuring a clean, secure connection between the battery and tank. The Micro+ battery will also flash red when pressed to indicate it needs to be charged.
If you have any further inquiries, please contact our Customer Service Department anytime Monday through Friday, 8:00am to 5:00pm PST.
Email: help@grencoscience.com
Phone: (800) 948-7480