The most secure way to travel - lock your luggage AND keep track of it. Get notified if someone takes your luggage or if it's left behind at the Airport. Compatible with Apple Find My App: Mark your luggage as lost and locate it through GPS with the Apple Find My Network, the help of hundreds of Apple devices around the world. Or play a sound on your SmartLock to find it nearby with Bluetooth. Does not work with Android devices. Water Resistant & Ready for Adventure: Don't worry about being caught in the rain or accidental spills. With an IPX3 rating, the SmartLock has you covered, no matter what the weather is outside. TSA Approved and Compliant. Ensure your luggage stays secure without risking damage during airport security inspections. SmartLock replaceable battery lasts up to 4 months. Rest assured, the combination lock will still lock and unlock even if the battery is dead. The battery powers the chip required to connect with the Apple FindMy network.