INNOL Key Finder Mini Waterproof Cell Phone Locator, Dog Tracker & Car Finder with App,Compatitable with iOS 7.0 and Above, Android 4.4 and Above system App Wireless Control Via Bluetooth 4.0 for Both iOS and Android System Bidirectional anti lost alarm system ,works as anti lost alarm, phone and product finder,remote shutter,lost history recorder Compatible with a free app for your smartphone or tablet (iOS and Android). Android system: 4.3 and above . iOS system: 7.0 and above Water-resistant ,iPX 67. Long Using Time: With built-in CR2032 battery and extra free battery smart key finder , smart tracker for car key , child ,pet and wallet . anti lost alarm