Compatible with iOS or Android smartphones; supports Bluetooth 4.0; effective range up to 25 m. Multitask control and tracking: Use the app to control Bluetooth Smart Tags and track multiple tags online at the same time. Find Phone and voice recording functions: Use as a remote shutter for self portraits and access voice recording function to capture moments. Beep reminders: An audible beep can alert you from either the smartphone or the Bluetooth Smart Tag when the devices are separated by a preset distance. Use scenarios Keys, wallet and valuables: Attach the tag to frequently misplaced items and locate them quickly via the app or by receiving a beep. Selfies and group photos: Use as a remote shutter to take photos without touching the phone, making it easier to capture moments. Travel bags and belongings: Place a tag in a bag or luggage and get alerted if you move beyond the preset distance.