【New, Unopened】 ★ Eliminates pet odors continuously just by placing it / Cage attachment type ★ Fragrance-free, doesn't mask odors with scent ★ Safe and reliable design, made in Japan ★ Dr. Deo Pet Series, permanent type for cage attachment ★ Can be installed on pet cage wires, circles, or walls near pet cages/toilets using the included hooks and double-sided tape ★ You can check the replacement timing by observing the change in the liquid color inside