Specifications:Ball design, beautiful and durable.Suction cup, easy to install.USB power supply, very convenient.Item Name: Fish Tank LightMaterial: PlasticQuantity: 1 PcFeatures: USB Design, Easy to Use, Portable, UsefulDiameter: 4.5cm/1.77" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Fish Tank Light