Connectivity: Bluetooth for promimity finding Sensor: Accelerometer Speaker: Built-in Speaker System Requriements: Apple ID iphone and ipod touch models with iOS 14.5 or later Ipad models with iPad OS 14.5 or later. Battery: User-replaceable CR2032 coin cell battery. Size: 36*36*7.8 mm,Weight: 11g   Features: *Accessbility: Record lost location, Rename Item, Customize item icon * Keep tracking and find your items alongside friends and devices in the Find My app * Simple one-tap setup instantly connects AirTag with your Phone or Pad * Play a sound on the built-in speaker to help find your things, or voice control * Precision Finding with Ultra Wideband technology leads you right to your nearby AirTag * Find items further away with the help of hundreds of millions in the Find My network * Put AirTag into Lost Mode to be automatically notified when it's detected in the Find My network * All communication with the Find My network is anonymous and encrypted for privacy, Location data and history are never stored on AirTag * Replaceable battery lasts over a year