Product parameters: Product weight: 7g Bluetooth version: Bluetooth 5.0 Using the system; IOS / Android Standby time: 6 months Effective distance: 15m Product size: 3.8 * 3.8 * 7M Description 1. This anti loss device is a low-power product based on Bluetooth 5.0. Through the app software of mobile terminal, the items (such as keys, handbags, etc.) that users are easy to lose are bundled together to prevent the loss of items; You can even hang the device on children to ensure that they are in your sight; Or hang them on your pets, so you don't have to worry about them getting lost 2. Switch on and off: power on: after pressing for about 3 seconds, the indicator light flashes rapidly for 10 seconds, and continues to flash every 2 seconds for 30 seconds under no connection and no key operation; Power off: long press about 3 seconds later, a long prompt sound of "drop" will sound, and the indicator light will go out 3. The location function can only keep the location when the anti loss device is disconnected from the mobile phone. The location record can be found in the "lost record". To use this function, you need to turn on GPS and keep your phone connected to the network 4. The product has two-way search function. The effective distance of the product is 15m. When the distance between the mobile phone and the object exceeds 15m, the object will automatically give an alarm to remind you; When the mobile phone or other items can't be found, double-click the anti lost device, and the mobile phone will give a prompt tone 5. You can connect to the mobile app. When the item doesn't know where it is, you can open the mobile app to view the specific location TRACKER FUNCTION : Anti-lost alarm can effectively protect your kids, pets or valuables from being lost or stolen within 75 Feet/25M effective distance range, when out of this range your phone and this device will automatically ring for a timely warning SMART & EASY TO SET UP : Locates where you last left your item to the nearest street and then give you the signal strength guiding you to your lost item! Through precise calculation, locate your pet, wallet and etc. via digital display, and you can even locate Your Phone by pressing the button on the gadget it will send the phone a ringing noise until you locate your phone. LONG BATTERY LIFE SUPPORTED : Benefiting from the built-in low consumption Bluetooth 4.0, the battery can last for about 6 Month.Uses one CR2032 coin battery (included).