This loss device is a product based on the latest Bluetooth 5.2 low-power technology. Through the use of APP software and mobile phones and other mobile devices for Bluetooth connection, it can bundle the items and valuables (such as keys, handbags, etc.) The effective use distance of the device can reach 25 meters in a wide range. The button battery CR2032 can be easily purchased in Major- supermarkets. The brand battery can work for more than half a year. Suitable for 11 and above can be used.Android Phones: Android 8.0 and above, Bluetooth 5.2 and above. At present, in order to increase the battery life of mainstream Android models, the system has been optimized to varying degrees, and will automatically clean up the app running in the background. When using the loss device, the app needs to be set and protected in the system to realize normal operation. 1. This loss device is a product based on the latest Bluetooth 5.2 low-power technology. Through the use of APP software and mobile phones and other mobile devices for Bluetooth connection, it can bundle the items and valuables (such as keys, handbags, etc.) 2. The effective use distance of the device can reach 25 meters in a wide range. The button battery CR2032 can be easily purchased in Major- supermarkets. The brand battery can work for more than half a year. 3. Suitable for 11 and above can be used.Android Phones: Android 8.0 and above, Bluetooth 5.2 and above. 4. At present, in order to increase the battery life of mainstream Android models, the system has been optimized to varying degrees, and will automatically clean up the app running in the background. When using the loss device, the app needs to be set and protected in the system to realize normal operation. 5. Although the setting steps of Android phones of each brand are different, they are almost the same. First check the power saving mode of your mobile phone system, and add the loss device app to the white list or protected program to prevent- the / loss device app from being shut down by the system and causing false alarm. Bare metal: 5.5g/piece (not charged) Battery: 3 g / piece Product specification: 60×30×10mm bag specification: 7×12cm Bag full set: 13g / piece (with battery) 10g / piece (without battery) Color: black- and white pink green blue colors This loss device is a product based on the latest Bluetooth 5.2 low-power technology. Through the use of APP software and mobile phones and other mobile devices for Bluetooth connection, it can bundle the items and valuables (such as keys, handbags, etc.) The effective use distance of the device can reach 25 meters in a wide range. The button battery CR2032 can be easily purchased in Major- supermarkets. The brand battery can work for more than half a year. Suitable for 11 and Kids Smart Watch 4g Locate My Keys Air Battery Child Locator Bracelet Stitching Stolen Lives Product specification: 60×30×10mm bag specification: 7×12cm Spotgen4 Toll Transponder Personal Vehicle Watch for Boy House Arrest Bracelet Prop Bare metal: 5.5g/piece (not charged) Curb Finders for Cars Key Trackers Kids Smart Device Track Device Smart Watch for Kids 4g 4. At present, in order to increase the battery life of mainstream Android models, the system has been optimized to varying degrees, and will automatically clean up the app running in the background. When using the loss device, the app needs to be set and protected in the system to realize normal operation. Watches for Kids Boys Vsm550 Smart Kids Kids Smart Watch for Boys Cat Trackers 5. Although the setting steps of Android phones of each brand are different, they are almost the same. First check the power saving mode of your mobile phone system, and add the loss device app to the white list or protected program to prevent- the / loss device app from being shut down by the system and causing false alarm. Electronic Logging Device Find My Favorite Things The Hidden Fees Child Locator Device 4 Track Recorder