The USB portable oxygen pump for fish tanks is a must-have for all fish enthusiasts. Its simple and convenient design makes it suitable for both beginners and experienced individuals. With its quiet operation, it can be used in various settings such rooms, bedrooms, and offices, providing a peaceful environment for your fish. Features - Color: Light Green -Material:Plastic - Size: 7.60X3.00X3.00cm/2.99X1.18X1.18in - Rated voltage: 5V -Easy to use and suitable for beginners and experienced individuals, this oxygen pump is designed to be user-friendly. -This convenient oxygen pump can be easily operated by both beginners and experienced individuals, very convenient. -Quiet operation for a peaceful fish-keeping environment, the silent oxygen pump operates silently, ensuring peaceful. -Versatile and can be used in various settings like living rooms and offices, this portable oxygen pump is versatile used. -This oxygen pump can be used in different settings such rooms, offices, or even outdoor spaces. Widely used. Package list: 1 tank oxygen pump