Specification: Finder distance: 0- 100 Feet BT version: BT 4.0 Color: 1 x black, 1 x green, 1 x blue, 1 x pink. Battery: Contains CR2032 Lithium Coin Battery (replaceable). Compatible Device: iOS: 7.0 version or later Android: 4.3 version or later compatible with iPad: compatible with iPad 1/2/3/4 or later, compatible with iPad Mini 2/3/4 or later, iTouch 5, compatible with iPad Pro 3/4 or later, compatible with iPad Air or later. Connect APP A- In the Google Play Store or compatible with Apple App Store search for "cTracing" or get the download link by scanning the QR code on the box, and download the APP; B- Long press the button on the smart locator, hear the "drop, drop" twice, the LED light is on; C- Search for the smart locator and connect to the app, slide left to delete the tracker, touch the ">" icon to rename the smart locator or disconnect; D- Long press to shut down. Photograph function The smart locator and app are connected: -In the app's Camera interface, press the button once to take pictures. Package: 4 X Key Finder Smart Key Finder: Key finder uses BT 4.0 technology to connect IOS 8.0 or above and Andrioid 4.3 or above smart phones. Show the lost car key, luggage, wallet, dogs, cats distance from you on the APP to let you find them accurately. APP Remote Control: Download the APP “Dycoo TrackerPA” then pair it with your smart phone. When you press the remote button, the receiver sounds "beeps" you can hear voices from the tracker within 75 ft by bluetooth connection. NOTES: Working distance: 0-30ft (Adjustable), Max. The distance can be up to 75ft in the open air. Two-way Notification: Attach this wireless tracker to anything we always forget key or wallet and keep track of them. The 2-way key finder will lets you track lost items or be notified when they are out of range with a ring or flash. Finder keychain: Key finder smart tracker with compact size, light weight and easy to carry like a key chain on your kids schoolbag or hang on pet collar, real-time viewing locator effectively avoids your kids, pets are lost. Provide a last seen pin-drop on map via APP to help you recover your items and search your car in parking site. Multi-function: Anti-lost alarm, tracking device, remote control self-portrait. Works as a remote shutter for self-portrait, You can remote control the smart phone camera of your with press on the finder button.