Dual Power Option Portable Dynamic Water Based 8 Colour Function RGB LED Upright Column Jelly Fish Lamp Includes Two Colour Contrasting Jellyfish that Appear to Shift Shade and Tone with Changes in the Lamp’s Lighting Silent Pump in Unit Dynamically Moves Jelly Fish Round Lamp Activated by Simple On/Off Push Button Operation Has 8 Lighting Modes including 7 Static Colours and a Pulsing/Phasing Colour Changing Setting for Mood Lighting Lamp Measures Around 23.5 cm by 9.5 cm by 9.5 cm | Sent Empty without Water for Safety During Shipment Can be Powered by either 2 x AA Batteries (Not Included) or via included USB-A to DC Barrel Jack Cable (Included)