1.Easy to carry,Not easy to lose,Lost pendants can also be easily found Easy to operate, easy to retrieve. 2.As long as your items surround the device, it's OK Track the location of items by finding my network. 3.When the item is lost, the APP accurately locks the last location. 4.Easy to adapt to various occasions, arbitrary wearFree to master, save effort and worry. 5.Refresh the position once every 5-10 minutesto grasp the target moving trajectory in time. Product Name:Intelligent anti-loss locator Battery:Button cell Operating voltage:DC 3V Buzzer:Built-in: Greater than75db(10cm) Wireless:BLE 5.1 Use the system:IOS Standby time:365 days Due to different batches, there may be differences in product appearance and printed text, which not affect use Colour:Black Material:ABS Package Contents: 1 x Intelligent anti-loss locator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.