Housing material: PVC
Power on: water sensor, not switch
Built-in 1 LED light, flash gradually with 3 different of colors, used in bathtub and make the baby funny
Stop working as soon as take it out of the tub and wipe off the water on its bottom
Battery-operated (3 pieces x AAA) but safe absolutely, batteries are changeable
Unit net weight: 170g
Unit size: 12.6 x 10.3 x 6.8cm