1.This tracking tag easily connects the card to your device. The left-behind reminder feature of our tracking tag ensures you never forget your belongings again. 2. If you leave your tracked item behind, your smartphone will send you a notification to remind you to retrieve it before it's too late. 3. The tracker tag includes a built-in speaker that allows you to easily find your belongings within a Bluetooth range of up to 164 feet. 4. You can share your tracking tag with up to 6 people, allowing them to see the location of the item without receiving tracking notifications. 5. This feature is perfect for sharing travel essentials with family, friends or colleagues while maintaining privacy and control over your tracking data. Battery:CR2032 Working voltage:DC 3.0V Wireless:BLE 5.2 Wireless distance:40m(open visual distance) Buzzer:Built-in 75 db(at 10cm) working temperature:-5°c to 45°C(23°F to 113°F) Working humidity:95%(no condensation) Colour:Black Material:ABS Package Contents: 1 x Anti-lost positioner 1 x English instruction manual 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.