I stumbled across this a couple months ago and thought "thats a great idea!". Its a battery powered air pump that plugs in. When it senses the power go out it turns on. I thought this was an appropriate time to set it up cuz my powered has flickered on and off a few times due to the storm. I have bsttery powered air pumps for emergencies but i physically have to be there to turn them on. This is great tho i just tucked it away in the corner of the tank and sure enough if the power goes out it kicks on. This is a great cheaper alternative for reefers that dont want to spend big bux on mp40s and battery backups. Ill prob purchase another 2 so i have 1 in sump 1 in display and 1 in frag tank. P.S. youll need to buy some longer airline they only include a 1 foot line which is useless but its a great deal for 20$






