1 CR2 batteries required.

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 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 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