Wireless Key FinderWith GPS remote control with 5.0 wireless system, you can easily search/locate lost items. The item locator with app supports iOS and Android phones. You can download iSearching app from Apple Store or Google Play. (Note: iOS 8.0 or above / Android 4.3 or above) Two-way SearchWhen you want to find the target object, just click the reminder in the app and the tracker will send an alarm for you recall the location of the object. When you find your phone, you just need to press the tracker button twice in quick succession and your phone will sound an alarm whether your phone is muted or not. Smart disconnect reminder If the mobile phone and the wireless tracker are not within the effective range, the mobile phone and the finder will remind you. The APP saves the location where the item was last disconnected from the mobile phone to narrow down the search area. It is a great gift for those who forget some things. Effective Coverage The effective distance between mobile phone and GPS button sight is about 15-30 meters meters outside. In case of obstacles, the effective distance is the shortest distance Small and portable The finder is very small and light, you can put it in your wallet, hang it on your backpack back, your suitcase and your keys. Easy to carry. There are 4 trackers in our package which can meet your additional needs. Note: 1.Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 3171 hours Hope you have a pleasant shopping experience!