Anti-lost Locator Key Finder Bluetooth Device for Apple iPhone 4s /iPad 3/4 /iPhone 5/iPad Mini -White Distance can be adjusted (0-10 m), with anti-lost, find, police voice prompts (with vibration function), automatic power-saving features, the use of advanced AES128 coding technology, stable and reliable Close-up alarm: approximately 4-8M-----can be used for mobile wallet anti-lost; Mid-range alarm: about 8-12M----Luggage can be used for anti-lost; More remote alarm: about 12-15M----can be used for children and pet anti-lost When the smaller anti-lost alarm sound or power bar does not appear,replace the battery.Opened the battery cover,remove the old battery,put a new battery to replace the battery cover. Stop using:Press anti-lost alarm button for 2 seconds,click connect the phone button to disconnect phone alarm,anti-lost 1 minute shutdown. Power: Bluetooth CSR4.0 of the main chip, built-in software Smart Sleep, ultra-low power consumption, static standby power consumption of only 0.4uA