Global Cloud Positioning Works with both Apple Find My (iOS) & Google's Find Hub (Android) Stylish Colors Offered in four attractive shades: Black, White, Pink, and Blue Loud Alert Sound Integrated speaker for fast locating Left Behind Alert Notifies you roughly 5 minutes after you leave (available for iOS devices only) Replaceable Battery Operates on a standard CR2032 battery IP68 Waterproof Fully shielded against dust and water submersion No App Required Utilizes built-in tracking apps on iOS and Android