Cobalt Aquatics DC USB Rechargeable Air Pump, Dual Output

I haven't been able to figure out how to set it to turn on when the power is out every 10 seconds. When I pull the plug, it turns on steady.

They work as advertised, the biggest downside is that they do not plug in using a standard usb or usb-c plug. I have 2 of these pumps and lost both of the power supplies during a move. Now they are useless. If i could use a type-c plug like other pumps then i could recommend these. But they don't.

I have been using it for a month now and have it sitting on half inch of foam behind display tank. The unit is louder than everything connected to my reef aquarium including protein skimmer when percolating. I can even hear it clearly competing with the waterfall between my 2 tanks. It is even louder than the dependable & working ac only air pump it replaces from a national retail chain. That being said I have tested disconnecting power and unit still pumps air. I am currently testing how long battery will run unit & will update review with result. Two other minor things I dislike are all the LED's constantly blink running connected to AC outlet with battery backup. Power cord is really short. All in all at this point I do not think you will find better feature wise.

I love the security of an air pump with a battery backup, but it is a little loud. It's not obnoxious, but I wouldn't place it on my desk in my office. It's not so noticeable from across the room. I will be purchasing another for my other tanks.

This products works great, the only complaint is it’s very noisy and rattles.

Had a short power outage and the pump came on like it should to keep tank oxygenated well enough. Also tested the length of time it will run before battery runs out (lasted even a bit longer than advertised)

i dislike this product , dont like having to charge it every other day.

Absolutely love it! Perfect for what I need. I love that it is portable and can be plugged in via USB. I can use it with a power bank or plugged into the wall.

Excelente equipo y buena calidad.

Parece un buen producto, lamentablemente la unidad que recibí resulto defectuosa y tuve que devolverla. En caso de adquirir el producto nuevamente, haré otra reseña.