Innovator Group USB Pet Water Dispenser Pump 5V Mute Micro Brushless DC Water Pump Automatic Drainage+1m Pipe1. USB power supply, 5V low voltage safety and stability 2. Adjustable flow rate, left and right toggle the flow rate adjustment valve can be adjusted to the size of the submersible pump's flow rate and head 3. Compact body, easy to carry and storage 4. No water power off models anti dry burning design, over the water level automatically pumping, below the water level automatically stop pumping, with color changing LED light prompts 5. Voltage: USB 5V