Features: 1. Handy keychain design. 2. DIY installation. 3. BT V4.0 technology. 4. Compatible with for iOS Smartphone. 5. Item finder tracking. Adjustable range sensitivity. Display on a map. 6. Support selfie funcion(only available on primary OVAL TrackMate). 7. LED visual indication. 8. Replaceable and long lasting battery. Functions: Active alert whenever TrackMate is out of detection range, both your device and TrackMate will have alert for warning. Find your TrackMate tab the searching button on app, TrackMate will give you beep sound and flashing light whenever it is in the range. Find your device press the button on dominant TrackMate, your device will be chiming for action. Last seen location tab the location pointer button on app to see the last location of your item on a map. Personalized setting to edit the name, icon, range sensitivity, alert repeat and sound tunes. Selfie remote the primary OVAL TrackMate support selfie fuction. Smartphone mute alert TrackMate mute alert General: Brand: Steelmate Model: i880 Color: black Material: plastic Package size: 15 * 10.5 * 2.5cm / 6 * 4 * 1in Package weight: 90g / 3oz Technical