This device is a product based on the new Bluetooth 4.0 low-power technology. Through the use of "itracing" app software and Bluetooth connection with mobile phones and other mobile devices, it can bundle the items and valuables (such as keys, handbags, etc.) that users are easy to lose together, realize the function of putting lost items and looking for mobile phones, and also realize remote photo taking and recording Sound and other functions (for example: party photo, selfie, etc.). Net weight: 11kg 4. Hang the - dropping device on children or to enjoy the playing time and control the distance at any time. 7. Bluetooth will be disconnected when the distance is more than 10 Product package size: 108 * 90 * 15mm Material: ABS Product size: 38 * 38 * 7mm 3. Put the - loss device on children or the elderly, and give an alarm in environment (such as shopping, tourism, etc.) to them from getting lost. 1. The - lost device is used as accessories (such as keys, bags, etc.) and can be used as remote control of self timer when going out, which is very convenient. Color: blue green rose red The effective use distance of this device can be up to 25 in a wide range, even you can use it on your baby or pet, so you don't have to worry about their loss any more; the button battery CR2032 used in this device can be purchased easily in all Major- convenience stores, and a direct battery can work for more than half a year. A battery A little rope A square loss preventer Gross weight: 12g 6. Support IOS system and Android system (it must be paired with mobile app and - loss device Bluetooth before use). 2. Alert the - to your belongings from being lost; 5. Using new Bluetooth 4.0 chip, low power consumption. The button battery is replaceable, and the light body is 8g. You can put it in your wallet. Battery: button battery CR2032 2. Alert The - To Your Belongings From Being Lost; 1. The - Lost Device Is Used As Accessories (such As Keys, Bags, Etc.) And Can Be Used As Remote Control Of Self Timer When Going Out, Which Is Very Convenient. Gross Weight: 12g The Effective Use Distance Of This Device Can Be Up To 25 In A Wide Range, Even You Can Use It On Your Baby Or Pet, So You Don't Have To Worry About Their Loss Any More; The Button Battery CR2032 Used In This Device Can Be Purchased Easily In All Major- Convenience Stores, And A Direct Battery Can Work For More Than Half A Year. Net Weight: 11kg