Product details:

The Solar Light Up Duck is the only chlorinator that uses energy from the sun to light up at night. Featuring a solar powered, rechargeable battery, this solar duck happily decorates your pool as it chlorinates. Contains an expandable basket and a light sensor to turn the unit on at dusk and off at dawn. Adjustable dispenser to ensure the right amount of chlorine is dispensed. Holds 3 in. chlorine tabs. Measures 10 in. x 8 in. x 11.75 in.