This system locates your cats wherever the mischievous felines are hiding. A homing tag attaches to the cat's collar and a credit card sized handset broadcasts a radio frequency that penetrates walls, doors, and furniture to locate the tag. The handset has eight LEDs that illuminate in succession to guide you in the direction of the cat, while an audible tone becomes louder as you close in. The two included homing tags transmit signals to the handset simultaneously and you can select which tag to track with the touch of a button. The homing tag weighs only 0.18 ounces so your cat will hardly know it's there. Locates up to four cats (two additional homing tags available below). Includes one CR2032 battery for the handset and GP390 batteries for the homing tags. Range is at least 300' indoors or outdoors. 3 1/4" L x 2 1/4" W. (2/3 oz.)