Convenient to Use: download the APP from the user's manual and it will work the GPS trackers are easy for your operation and you just need to press the button for a few seconds then the receiver will sound beeps after that you can use your cellphone to search and connect to the device if you lost your phone you can double press the button then your phone would alarm Practical Presents: when you're scrambling to find your things this GPS tracking tag is the nice thing you need; No matter whether you use it yourself or send it to your family elderly parents and forgetful friends it will definitely make them feel warm and valued Timely Reminders: when you install these GPS trackers for dogs behind your phones keys and other things that are easy to lose they will sound or flash if your keys leave you beyond a certain range informing you to find the lost items in time besides they and your phone will alarm together when disconnecting and this function could be turned off in setting Long Battery Life: adopting battery CR2032 power supply the standby time of item finders is estimated to be more than 6 months featuring low power consumption easy to replace the battery after running out of power Quickly Find Items: the key finder locators can be hung on your phones keys bags umbrellas pets cats wallets purses luggage and other important items convenient for you to find them quickly and easily bringing a lot of convenience to your life; The tracking range is about 15 meters. Note: The package contains a paper instruction manual please refer to the instruction manual when you use it.