Review on Portable USB Charging Air Pump for Aquariums & Fishing - Great for Fish Tank, Fish Transportation, Freshwater & Marine Aquariums, Outdoor Fishing by Tracey Mack

Bought 3 of these and they work great! Powerful dual pumps for air generation: 2 for 180 gallons and 1 for 100 gallons. I like that they work even if there is a power outage. Months have passed and they are still going strong. Gives me peace of mind knowing I've got something for my tanks when our sorties work like clockwork. I replaced the cables with longer ones to get to the power section. I will order 2 more just as backups.