5Pcs Smart Key Finder Anti-lost Alarm Tracking and positioning: This anti-lost smart viewfinder uses the latest Bluetooth 4 technology, which is convenient like a key ring, easy to carry and use, to ensure the safety of your valuable items, within your range. Press the two anti-lost devices at the same time, the mobile phone alarm. Press the call in the mobile app, the anti-lost device alarm, and retrieve it along the way. Smart and easy to set up: Bluetooth connectivity remote control is easy to use with the app. This smart search function can also be a self-timer shutter in the key viewfinder locator tracker. Remote self-timer, easy to control the phone remote (maximum 10 meters) to take pictures. Long working distance: The finder positioner tracker controls the distance range is 10-15m. Your anti-lost, when the mobile phone and anti-lost device exceed the default effective distance, two-way automatic alarm, search the owner to prevent loss (used in, old people, children, pets, etc.) Multi-tasking management, a mobile phone, can manage up to 6 anti-lost devices at the same time. Versatile: Anti-lost alarm to protect your valuables, kids, wallets, cars, bags, pets from loss. The Key Viewfinder Locator Tracker also provides the last seen Pin-Drop on the map via the app to help recover your items and search for cars in the parking lot. Remote control: You can remotely control your phones camera or recording by pressing a button. You can take great wide-angle selfies from the front or rear camera. As a self-timer remote shutter, its easy to capture the happiest moments.