High Quality: Bluetooth 5.0 technology with low power consumption and a replaceable button battery offering over 10 months of standby time. Two-Way Connection: Connects to your phone's Bluetooth. Both your phone and the anti-loss device will alarm if the Bluetooth range is exceeded. Service distance is approximately 10-25m (indoor/outdoor dependent). Dog Claw Design: Features a beautiful and modern appearance. Available in eight main colors (white, gray, dark blue, black, green, pink, red, and sky blue) to suit individual preferences. Widely Used: Ideal for pets, luggage, handbags, children, etc., to prevent loss and provide protection. A fantastic gadget for tracking and finding your belongings. Compatibility: Displays the map location when the device is disconnected from your phone. Compatible with iOS and Android 4.3 or later (requires Bluetooth 5.0).