Pet Dog Small GPS Transmitter Tracking Tracker Waterproof Smart Mini App GPS Transmitter Key Holder Car Small Wallet Children's Bag Valuables Lost Item Prevention Tracking Dustproof Mini size, pocket size GPS *Also possible for keychains, wallets, and pets! Pet dogs GPS tracker Bluetooth connection Compatible systems: iOS 7.0 or later, Android 4.4 or later iserching app download required (included in the English instruction manual) Press and hold to turn on the power ☆ iOS/Android compatible Product weight: Approximately 7g Color box packaging: Approximately 7 x 9 x 2cm / 2.76 x 3.54 x 0.79 inches. Size: Approximately 38 x 38 x 7mm / 1.5 x 1.5 x 0.28 inches. Material: ABS Usable distance: Approximately 15 meters Powered by CR2032 button battery *Approximately 10 months of long standby time ver.: 4.0 ★Thank you for viewing. (Nervous people) please refrain from purchasing☆