●The following information applies to each unit per pack ●The replaceable battery lasts over a year and AirTag is protected from water and dust according to IP67 ●Keep an eye on your things and find them, your friends and your other devices in the "Where is?" App ●Just one tap is enough to pair your AirTag with your iPhone or iPad ●Play a sound with the built-in speaker and find your stuff. Or just ask Siri for help ●Accurate search uses ultra-wideband technology to guide you directly to your AirTag nearby (iPhone 11 or later) ●Find more distant items with the help of hundreds of millions of Apple devices in the "Where is?" Network