Two-way alert: The smart tracker has a two-way warning system. If you lose your keys, simply use the app to make the tracker ring. Alternatively, if you can't find your phone, press the button on the tracker to make your phone ring, even when it's on silent mode. This mutual find feature ensures that you can quickly locate your lost items, saving you valuable time and reducing stress. The effective range of this warning system is up to 15 meters. Breakpoint Positioning: This smart tracker uses breakpoint positioning technology. When the connection between the tracker and your phone is lost, the app will automatically record the last known location. This feature is incredibly useful for tracking your steps and finding lost items, especially in crowded or unfamiliar areas. The breakpoint positioning provides a reliable reference point, significantly increasing the chances of recovering your belongings quickly and efficiently. Compact and Portable: Designed for ultimate convenience, this smart tracker is incredibly compact and lightweight. Its small size (3.8 cm x 3.8 cm x 0.7 cm) allows you to easily attach it to keys, wallets, bags, or even pets without adding bulk. The tracker can be paired with accessories such as keychains, lanyards, or silicone cases for added versatility. Its discreet design ensures that it seamlessly integrates into your daily life, providing peace of mind without being cumbersome. <> <br>Specifications: Size: Length: 3.8cm, Width: 3.8cm, Height: 0.7cm Material: ABS + Electronic components Package includes: Anti-loss device x 1 Instruction manual x 1