Specifications: Exquisite and lightweight, easy to carry. Low noise design will not disturb your daily life. Applicable to supply oxygen for fish tank or aquarium. Item Name: Oxygen Pump/Accessories Material: Plastic Voltage: AC 220V/50Hz Plug: EU Plug A: Single Outlet Oxygen Pump: Power: 3W Frequency: 1.2L/Min Size: 10.5cm x 5cm x 4.5cm/4.1" x 1.97" x 1.77" (Approx.) B: Double Outlet Oxygen Pump: Power: 5W Frequency: 4.5L/Min Size: 10cm x 7.5cm x 4cm/3.94" x 2.96" x 1.57" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: Type A: 1 x Single Outlet Oxygen Pump (Plastic Pipe/Bubble Stone Not Included) Or Type B: 1 x Double Outlet Oxygen Pump (Plastic Pipe/Bubble Stone Not Included) Or Type C: 1 x 2m Plastic Pipe 1 x Bubble Stone (Oxygen Pump Not Included) Or Type D: 1 x 4m Plastic Pipe 2 x Bubble Stone (Oxygen Pump Not Included)