Two-Way Anti-Loss: Never lose your valuables again with the two-way anti-loss feature. If the anti-loss device is outside the set range, both the device and your smartphone app will sound an alarm, providing a double layer of protection. This feature ensures that you are immediately alerted if your keys, wallet, or even your pet wanders too far, giving you peace of mind and preventing potential loss or theft. The effective range is up to 15 meters. Breakpoint Positioning: The breakpoint positioning function automatically records the last location where the anti-loss device was connected to your smartphone. This is incredibly useful for tracking your steps if you're misplacing an item. Open the app to see a map that shows the last known location, making it easier to find your lost keys, wallet, or other valuables. This feature saves time and reduces the stress of looking for lost items. Remote Control Features: This anti-loss device also doubles as a remote control for your smartphone. Use it to remotely trigger your phone's camera for selfies or group photos, or to start and stop voice recordings. This added functionality makes it a versatile tool for everyday use, whether you're capturing memories or taking quick notes. The remote control function is easy to use and adds extra convenience to your daily routine. Specifications: Size: Length: 5cm, Width: 2.6cm, Height: 1cm Material: ABS + Electronic Components Package includes: Anti-loss device x 1 User manual x 1