dern pet water dispenser: qr90a, usb-powered, brushless, micro dc pump for soilless cultivation or pet use submersible pump qr90a: ideal for hydroponics or pet water fountains, micro dc, brushless, usb-powered design brushless micro dc pump: qr90a, usb-powered, perfect for soilless cultivation or pet water fountains, submersible design usb-powered micro dc pump: qr90a, brushless design, ideal for hydroponics or pet water fountains, submersible pump soilless cultivation pump: qr90a, micro dc, brushless, usb-powered, submersible design for hydroponics or pet water fountains