Product Name: Round Bluetooth Anti-lost Device Product net weight: 10g Gross product weight: 24g Material: Acrylic/ABS Product size: 42428mm Color: black + white + blue + pink Quantity delivered: 4 pieces Battery: CR2032 button battery APP: isearching 【Customizable Geofence Zones】The safety fence system lets you know if your pet is in a safe zone. You can define a safe zone, where you think the animal is safe and protected. Use the appto map out safe zones around your favorite yard or park, and get instant alerts when your dog has exceeded those boundaries. 【Real Time Bluetooth Dog Collar】The Bluetooth tracker works with Bluetooth, WiFi, AGPS, LBS and long distance wireless technology system. Animals wearing the tracker can be precisely walked and traced. The locationtracking is updated by sending SMS and it is displayed on APP and internet.Navigation accuracy is within 10 meters range.Always know your pet’s exact location with accurate GPS! 【Easy to use】The Bluetooth tracker