Features: Small in size, thin and lightweight, easily hanged to the bag, luggage, wallets or keychain, suitable for various items tracking. Designed to work with iOS Find My App, with very loud sound about 90-95dB, you can find the items quickly. Smarttracker wireless bluetooth-compatible range up to 10-20m/32.8-65.6ft indoor, and 20-30m/65.6-98.4 outdoor(barrier-free). Built-in replaceable CR2032 battery cell, low power consumption chip, long-lasting working. Intelligent key finder/item locator, helps to solve annoying problems daily or at work or in life, best tracker you have never seen before, strong abilities make it great gift for someone you loved. Specifications: Material: ABS Color: White, Black, Pink(optional) Size: Approx. 42x36x8mm/1.65x1.41x0.31inch Builyt-in Battery: CR2032 Button Cell Applicable System: for iOS Connection Way: Bluetooth-compatible Connection Sound: 90-95dB Connection Distance: 10-20m/32.8-65.6ft indoor, 20-30m/65.6-98.4 outdoor Package Includes: 1x Smart Tracker note: Please allow 0-1cm error due to manual measurement. make sure you do not mind before you order. Please allow slight chromatic aberration due to different display resolutions.