About this item Operates with all Marco Polo Locators, sold separately, adds one pet to your system or may be used to upgrade existing Marco Polo systems Works anywhere, totally self-contained, no GPS or cell network required, no monthly service contracts, ideal for traveling with your pets Tracking tags weigh only 0. 8 oz. , can be used for prolonged swimming and are tough enough for the most active pets Rechargeable battery on pet’s collar lasts up to 6 weeks while being continuously monitored When combined with the pinpoint accuracy of the Marco Polo Locator, the Advanced Tracking Tag is an ideal solution for locating cats Brand:Marco Polo Special Feature:Waterproof Connectivity Technology:RF Supported Application:GPS Specific Uses For Product:Traveling with Pets